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Lau F, Kuziemsky C, editors. Handbook of eHealth Evaluation: An Evidence-based Approach [Internet]. Victoria (BC): University of Victoria; 2017 Feb 27.

Handbook of eHealth Evaluation: An Evidence-based Approach [Internet].

Chapter 10 methods for comparative studies.

Francis Lau and Anne Holbrook .

10.1. Introduction

In eHealth evaluation, comparative studies aim to find out whether group differences in eHealth system adoption make a difference in important outcomes. These groups may differ in their composition, the type of system in use, and the setting where they work over a given time duration. The comparisons are to determine whether significant differences exist for some predefined measures between these groups, while controlling for as many of the conditions as possible such as the composition, system, setting and duration.

According to the typology by Friedman and Wyatt (2006) , comparative studies take on an objective view where events such as the use and effect of an eHealth system can be defined, measured and compared through a set of variables to prove or disprove a hypothesis. For comparative studies, the design options are experimental versus observational and prospective versus retro­­spective. The quality of eHealth comparative studies depends on such aspects of methodological design as the choice of variables, sample size, sources of bias, confounders, and adherence to quality and reporting guidelines.

In this chapter we focus on experimental studies as one type of comparative study and their methodological considerations that have been reported in the eHealth literature. Also included are three case examples to show how these studies are done.

10.2. Types of Comparative Studies

Experimental studies are one type of comparative study where a sample of participants is identified and assigned to different conditions for a given time duration, then compared for differences. An example is a hospital with two care units where one is assigned a cpoe system to process medication orders electronically while the other continues its usual practice without a cpoe . The participants in the unit assigned to the cpoe are called the intervention group and those assigned to usual practice are the control group. The comparison can be performance or outcome focused, such as the ratio of correct orders processed or the occurrence of adverse drug events in the two groups during the given time period. Experimental studies can take on a randomized or non-randomized design. These are described below.

10.2.1. Randomized Experiments

In a randomized design, the participants are randomly assigned to two or more groups using a known randomization technique such as a random number table. The design is prospective in nature since the groups are assigned concurrently, after which the intervention is applied then measured and compared. Three types of experimental designs seen in eHealth evaluation are described below ( Friedman & Wyatt, 2006 ; Zwarenstein & Treweek, 2009 ).

Randomized controlled trials ( rct s) – In rct s participants are randomly assigned to an intervention or a control group. The randomization can occur at the patient, provider or organization level, which is known as the unit of allocation. For instance, at the patient level one can randomly assign half of the patients to receive emr reminders while the other half do not. At the provider level, one can assign half of the providers to receive the reminders while the other half continues with their usual practice. At the organization level, such as a multisite hospital, one can randomly assign emr reminders to some of the sites but not others. Cluster randomized controlled trials ( crct s) – In crct s, clusters of participants are randomized rather than by individual participant since they are found in naturally occurring groups such as living in the same communities. For instance, clinics in one city may be randomized as a cluster to receive emr reminders while clinics in another city continue their usual practice. Pragmatic trials – Unlike rct s that seek to find out if an intervention such as a cpoe system works under ideal conditions, pragmatic trials are designed to find out if the intervention works under usual conditions. The goal is to make the design and findings relevant to and practical for decision-makers to apply in usual settings. As such, pragmatic trials have few criteria for selecting study participants, flexibility in implementing the intervention, usual practice as the comparator, the same compliance and follow-up intensity as usual practice, and outcomes that are relevant to decision-makers.

10.2.2. Non-randomized Experiments

Non-randomized design is used when it is neither feasible nor ethical to randomize participants into groups for comparison. It is sometimes referred to as a quasi-experimental design. The design can involve the use of prospective or retrospective data from the same or different participants as the control group. Three types of non-randomized designs are described below ( Harris et al., 2006 ).

Intervention group only with pretest and post-test design – This design involves only one group where a pretest or baseline measure is taken as the control period, the intervention is implemented, and a post-test measure is taken as the intervention period for comparison. For example, one can compare the rates of medication errors before and after the implementation of a cpoe system in a hospital. To increase study quality, one can add a second pretest period to decrease the probability that the pretest and post-test difference is due to chance, such as an unusually low medication error rate in the first pretest period. Other ways to increase study quality include adding an unrelated outcome such as patient case-mix that should not be affected, removing the intervention to see if the difference remains, and removing then re-implementing the intervention to see if the differences vary accordingly. Intervention and control groups with post-test design – This design involves two groups where the intervention is implemented in one group and compared with a second group without the intervention, based on a post-test measure from both groups. For example, one can implement a cpoe system in one care unit as the intervention group with a second unit as the control group and compare the post-test medication error rates in both units over six months. To increase study quality, one can add one or more pretest periods to both groups, or implement the intervention to the control group at a later time to measure for similar but delayed effects. Interrupted time series ( its ) design – In its design, multiple measures are taken from one group in equal time intervals, interrupted by the implementation of the intervention. The multiple pretest and post-test measures decrease the probability that the differences detected are due to chance or unrelated effects. An example is to take six consecutive monthly medication error rates as the pretest measures, implement the cpoe system, then take another six consecutive monthly medication error rates as the post-test measures for comparison in error rate differences over 12 months. To increase study quality, one may add a concurrent control group for comparison to be more convinced that the intervention produced the change.

10.3. Methodological Considerations

The quality of comparative studies is dependent on their internal and external validity. Internal validity refers to the extent to which conclusions can be drawn correctly from the study setting, participants, intervention, measures, analysis and interpretations. External validity refers to the extent to which the conclusions can be generalized to other settings. The major factors that influence validity are described below.

10.3.1. Choice of Variables

Variables are specific measurable features that can influence validity. In comparative studies, the choice of dependent and independent variables and whether they are categorical and/or continuous in values can affect the type of questions, study design and analysis to be considered. These are described below ( Friedman & Wyatt, 2006 ).

Dependent variables – This refers to outcomes of interest; they are also known as outcome variables. An example is the rate of medication errors as an outcome in determining whether cpoe can improve patient safety. Independent variables – This refers to variables that can explain the measured values of the dependent variables. For instance, the characteristics of the setting, participants and intervention can influence the effects of cpoe . Categorical variables – This refers to variables with measured values in discrete categories or levels. Examples are the type of providers (e.g., nurses, physicians and pharmacists), the presence or absence of a disease, and pain scale (e.g., 0 to 10 in increments of 1). Categorical variables are analyzed using non-parametric methods such as chi-square and odds ratio. Continuous variables – This refers to variables that can take on infinite values within an interval limited only by the desired precision. Examples are blood pressure, heart rate and body temperature. Continuous variables are analyzed using parametric methods such as t -test, analysis of variance or multiple regression.

10.3.2. Sample Size

Sample size is the number of participants to include in a study. It can refer to patients, providers or organizations depending on how the unit of allocation is defined. There are four parts to calculating sample size. They are described below ( Noordzij et al., 2010 ).

Significance level – This refers to the probability that a positive finding is due to chance alone. It is usually set at 0.05, which means having a less than 5% chance of drawing a false positive conclusion. Power – This refers to the ability to detect the true effect based on a sample from the population. It is usually set at 0.8, which means having at least an 80% chance of drawing a correct conclusion. Effect size – This refers to the minimal clinically relevant difference that can be detected between comparison groups. For continuous variables, the effect is a numerical value such as a 10-kilogram weight difference between two groups. For categorical variables, it is a percentage such as a 10% difference in medication error rates. Variability – This refers to the population variance of the outcome of interest, which is often unknown and is estimated by way of standard deviation ( sd ) from pilot or previous studies for continuous outcome.

Sample Size Equations for Comparing Two Groups with Continuous and Categorical Outcome Variables.

An example of sample size calculation for an rct to examine the effect of cds on improving systolic blood pressure of hypertensive patients is provided in the Appendix. Refer to the Biomath website from Columbia University (n.d.) for a simple Web-based sample size / power calculator.

10.3.3. Sources of Bias

There are five common sources of biases in comparative studies. They are selection, performance, detection, attrition and reporting biases ( Higgins & Green, 2011 ). These biases, and the ways to minimize them, are described below ( Vervloet et al., 2012 ).

Selection or allocation bias – This refers to differences between the composition of comparison groups in terms of the response to the intervention. An example is having sicker or older patients in the control group than those in the intervention group when evaluating the effect of emr reminders. To reduce selection bias, one can apply randomization and concealment when assigning participants to groups and ensure their compositions are comparable at baseline. Performance bias – This refers to differences between groups in the care they received, aside from the intervention being evaluated. An example is the different ways by which reminders are triggered and used within and across groups such as electronic, paper and phone reminders for patients and providers. To reduce performance bias, one may standardize the intervention and blind participants from knowing whether an intervention was received and which intervention was received. Detection or measurement bias – This refers to differences between groups in how outcomes are determined. An example is where outcome assessors pay more attention to outcomes of patients known to be in the intervention group. To reduce detection bias, one may blind assessors from participants when measuring outcomes and ensure the same timing for assessment across groups. Attrition bias – This refers to differences between groups in ways that participants are withdrawn from the study. An example is the low rate of participant response in the intervention group despite having received reminders for follow-up care. To reduce attrition bias, one needs to acknowledge the dropout rate and analyze data according to an intent-to-treat principle (i.e., include data from those who dropped out in the analysis). Reporting bias – This refers to differences between reported and unreported findings. Examples include biases in publication, time lag, citation, language and outcome reporting depending on the nature and direction of the results. To reduce reporting bias, one may make the study protocol available with all pre-specified outcomes and report all expected outcomes in published results.

10.3.4. Confounders

Confounders are factors other than the intervention of interest that can distort the effect because they are associated with both the intervention and the outcome. For instance, in a study to demonstrate whether the adoption of a medication order entry system led to lower medication costs, there can be a number of potential confounders that can affect the outcome. These may include severity of illness of the patients, provider knowledge and experience with the system, and hospital policy on prescribing medications ( Harris et al., 2006 ). Another example is the evaluation of the effect of an antibiotic reminder system on the rate of post-operative deep venous thromboses ( dvt s). The confounders can be general improvements in clinical practice during the study such as prescribing patterns and post-operative care that are not related to the reminders ( Friedman & Wyatt, 2006 ).

To control for confounding effects, one may consider the use of matching, stratification and modelling. Matching involves the selection of similar groups with respect to their composition and behaviours. Stratification involves the division of participants into subgroups by selected variables, such as comorbidity index to control for severity of illness. Modelling involves the use of statistical techniques such as multiple regression to adjust for the effects of specific variables such as age, sex and/or severity of illness ( Higgins & Green, 2011 ).

10.3.5. Guidelines on Quality and Reporting

There are guidelines on the quality and reporting of comparative studies. The grade (Grading of Recommendations Assessment, Development and Evaluation) guidelines provide explicit criteria for rating the quality of studies in randomized trials and observational studies ( Guyatt et al., 2011 ). The extended consort (Consolidated Standards of Reporting Trials) Statements for non-pharmacologic trials ( Boutron, Moher, Altman, Schulz, & Ravaud, 2008 ), pragmatic trials ( Zwarestein et al., 2008 ), and eHealth interventions ( Baker et al., 2010 ) provide reporting guidelines for randomized trials.

The grade guidelines offer a system of rating quality of evidence in systematic reviews and guidelines. In this approach, to support estimates of intervention effects rct s start as high-quality evidence and observational studies as low-quality evidence. For each outcome in a study, five factors may rate down the quality of evidence. The final quality of evidence for each outcome would fall into one of high, moderate, low, and very low quality. These factors are listed below (for more details on the rating system, refer to Guyatt et al., 2011 ).

Design limitations – For rct s they cover the lack of allocation concealment, lack of blinding, large loss to follow-up, trial stopped early or selective outcome reporting. Inconsistency of results – Variations in outcomes due to unexplained heterogeneity. An example is the unexpected variation of effects across subgroups of patients by severity of illness in the use of preventive care reminders. Indirectness of evidence – Reliance on indirect comparisons due to restrictions in study populations, intervention, comparator or outcomes. An example is the 30-day readmission rate as a surrogate outcome for quality of computer-supported emergency care in hospitals. Imprecision of results – Studies with small sample size and few events typically would have wide confidence intervals and are considered of low quality. Publication bias – The selective reporting of results at the individual study level is already covered under design limitations, but is included here for completeness as it is relevant when rating quality of evidence across studies in systematic reviews.

The original consort Statement has 22 checklist items for reporting rct s. For non-pharmacologic trials extensions have been made to 11 items. For pragmatic trials extensions have been made to eight items. These items are listed below. For further details, readers can refer to Boutron and colleagues (2008) and the consort website ( consort , n.d.).

Title and abstract – one item on the means of randomization used. Introduction – one item on background, rationale, and problem addressed by the intervention. Methods – 10 items on participants, interventions, objectives, outcomes, sample size, randomization (sequence generation, allocation concealment, implementation), blinding (masking), and statistical methods. Results – seven items on participant flow, recruitment, baseline data, numbers analyzed, outcomes and estimation, ancillary analyses, adverse events. Discussion – three items on interpretation, generalizability, overall evidence.

The consort Statement for eHealth interventions describes the relevance of the consort recommendations to the design and reporting of eHealth studies with an emphasis on Internet-based interventions for direct use by patients, such as online health information resources, decision aides and phr s. Of particular importance is the need to clearly define the intervention components, their role in the overall care process, target population, implementation process, primary and secondary outcomes, denominators for outcome analyses, and real world potential (for details refer to Baker et al., 2010 ).

10.4. Case Examples

10.4.1. pragmatic rct in vascular risk decision support.

Holbrook and colleagues (2011) conducted a pragmatic rct to examine the effects of a cds intervention on vascular care and outcomes for older adults. The study is summarized below.

Setting – Community-based primary care practices with emr s in one Canadian province. Participants – English-speaking patients 55 years of age or older with diagnosed vascular disease, no cognitive impairment and not living in a nursing home, who had a provider visit in the past 12 months. Intervention – A Web-based individualized vascular tracking and advice cds system for eight top vascular risk factors and two diabetic risk factors, for use by both providers and patients and their families. Providers and staff could update the patient’s profile at any time and the cds algorithm ran nightly to update recommendations and colour highlighting used in the tracker interface. Intervention patients had Web access to the tracker, a print version mailed to them prior to the visit, and telephone support on advice. Design – Pragmatic, one-year, two-arm, multicentre rct , with randomization upon patient consent by phone, using an allocation-concealed online program. Randomization was by patient with stratification by provider using a block size of six. Trained reviewers examined emr data and conducted patient telephone interviews to collect risk factors, vascular history, and vascular events. Providers completed questionnaires on the intervention at study end. Patients had final 12-month lab checks on urine albumin, low-density lipoprotein cholesterol, and A1c levels. Outcomes – Primary outcome was based on change in process composite score ( pcs ) computed as the sum of frequency-weighted process score for each of the eight main risk factors with a maximum score of 27. The process was considered met if a risk factor had been checked. pcs was measured at baseline and study end with the difference as the individual primary outcome scores. The main secondary outcome was a clinical composite score ( ccs ) based on the same eight risk factors compared in two ways: a comparison of the mean number of clinical variables on target and the percentage of patients with improvement between the two groups. Other secondary outcomes were actual vascular event rates, individual pcs and ccs components, ratings of usability, continuity of care, patient ability to manage vascular risk, and quality of life using the EuroQol five dimensions questionnaire ( eq-5D) . Analysis – 1,100 patients were needed to achieve 90% power in detecting a one-point pcs difference between groups with a standard deviation of five points, two-tailed t -test for mean difference at 5% significance level, and a withdrawal rate of 10%. The pcs , ccs and eq-5D scores were analyzed using a generalized estimating equation accounting for clustering within providers. Descriptive statistics and χ2 tests or exact tests were done with other outcomes. Findings – 1,102 patients and 49 providers enrolled in the study. The intervention group with 545 patients had significant pcs improvement with a difference of 4.70 ( p < .001) on a 27-point scale. The intervention group also had significantly higher odds of rating improvements in their continuity of care (4.178, p < .001) and ability to improve their vascular health (3.07, p < .001). There was no significant change in vascular events, clinical variables and quality of life. Overall the cds intervention led to reduced vascular risks but not to improved clinical outcomes in a one-year follow-up.

10.4.2. Non-randomized Experiment in Antibiotic Prescribing in Primary Care

Mainous, Lambourne, and Nietert (2013) conducted a prospective non-randomized trial to examine the impact of a cds system on antibiotic prescribing for acute respiratory infections ( ari s) in primary care. The study is summarized below.

Setting – A primary care research network in the United States whose members use a common emr and pool data quarterly for quality improvement and research studies. Participants – An intervention group with nine practices across nine states, and a control group with 61 practices. Intervention – Point-of-care cds tool as customizable progress note templates based on existing emr features. cds recommendations reflect Centre for Disease Control and Prevention ( cdc ) guidelines based on a patient’s predominant presenting symptoms and age. cds was used to assist in ari diagnosis, prompt antibiotic use, record diagnosis and treatment decisions, and access printable patient and provider education resources from the cdc . Design – The intervention group received a multi-method intervention to facilitate provider cds adoption that included quarterly audit and feedback, best practice dissemination meetings, academic detailing site visits, performance review and cds training. The control group did not receive information on the intervention, the cds or education. Baseline data collection was for three months with follow-up of 15 months after cds implementation. Outcomes – The outcomes were frequency of inappropriate prescribing during an ari episode, broad-spectrum antibiotic use and diagnostic shift. Inappropriate prescribing was computed by dividing the number of ari episodes with diagnoses in the inappropriate category that had an antibiotic prescription by the total number of ari episodes with diagnosis for which antibiotics are inappropriate. Broad-spectrum antibiotic use was computed by all ari episodes with a broad-spectrum antibiotic prescription by the total number of ari episodes with an antibiotic prescription. Antibiotic drift was computed in two ways: dividing the number of ari episodes with diagnoses where antibiotics are appropriate by the total number of ari episodes with an antibiotic prescription; and dividing the number of ari episodes where antibiotics were inappropriate by the total number of ari episodes. Process measure included frequency of cds template use and whether the outcome measures differed by cds usage. Analysis – Outcomes were measured quarterly for each practice, weighted by the number of ari episodes during the quarter to assign greater weight to practices with greater numbers of relevant episodes and to periods with greater numbers of relevant episodes. Weighted means and 95% ci s were computed separately for adult and pediatric (less than 18 years of age) patients for each time period for both groups. Baseline means in outcome measures were compared between the two groups using weighted independent-sample t -tests. Linear mixed models were used to compare changes over the 18-month period. The models included time, intervention status, and were adjusted for practice characteristics such as specialty, size, region and baseline ari s. Random practice effects were included to account for clustering of repeated measures on practices over time. P -values of less than 0.05 were considered significant. Findings – For adult patients, inappropriate prescribing in ari episodes declined more among the intervention group (-0.6%) than the control group (4.2%)( p = 0.03), and prescribing of broad-spectrum antibiotics declined by 16.6% in the intervention group versus an increase of 1.1% in the control group ( p < 0.0001). For pediatric patients, there was a similar decline of 19.7% in the intervention group versus an increase of 0.9% in the control group ( p < 0.0001). In summary, the cds had a modest effect in reducing inappropriate prescribing for adults, but had a substantial effect in reducing the prescribing of broad-spectrum antibiotics in adult and pediatric patients.

10.4.3. Interrupted Time Series on EHR Impact in Nursing Care

Dowding, Turley, and Garrido (2012) conducted a prospective its study to examine the impact of ehr implementation on nursing care processes and outcomes. The study is summarized below.

Setting – Kaiser Permanente ( kp ) as a large not-for-profit integrated healthcare organization in the United States. Participants – 29 kp hospitals in the northern and southern regions of California. Intervention – An integrated ehr system implemented at all hospitals with cpoe , nursing documentation and risk assessment tools. The nursing component for risk assessment documentation of pressure ulcers and falls was consistent across hospitals and developed by clinical nurses and informaticists by consensus. Design – its design with monthly data on pressure ulcers and quarterly data on fall rates and risk collected over seven years between 2003 and 2009. All data were collected at the unit level for each hospital. Outcomes – Process measures were the proportion of patients with a fall risk assessment done and the proportion with a hospital-acquired pressure ulcer ( hapu ) risk assessment done within 24 hours of admission. Outcome measures were fall and hapu rates as part of the unit-level nursing care process and nursing sensitive outcome data collected routinely for all California hospitals. Fall rate was defined as the number of unplanned descents to the floor per 1,000 patient days, and hapu rate was the percentage of patients with stages i-IV or unstageable ulcer on the day of data collection. Analysis – Fall and hapu risk data were synchronized using the month in which the ehr was implemented at each hospital as time zero and aggregated across hospitals for each time period. Multivariate regression analysis was used to examine the effect of time, region and ehr . Findings – The ehr was associated with significant increase in document rates for hapu risk (2.21; 95% CI 0.67 to 3.75) and non-significant increase for fall risk (0.36; -3.58 to 4.30). The ehr was associated with 13% decrease in hapu rates (-0.76; -1.37 to -0.16) but no change in fall rates (-0.091; -0.29 to 011). Hospital region was a significant predictor of variation for hapu (0.72; 0.30 to 1.14) and fall rates (0.57; 0.41 to 0.72). During the study period, hapu rates decreased significantly (-0.16; -0.20 to -0.13) but not fall rates (0.0052; -0.01 to 0.02). In summary, ehr implementation was associated with a reduction in the number of hapu s but not patient falls, and changes over time and hospital region also affected outcomes.

10.5. Summary

In this chapter we introduced randomized and non-randomized experimental designs as two types of comparative studies used in eHealth evaluation. Randomization is the highest quality design as it reduces bias, but it is not always feasible. The methodological issues addressed include choice of variables, sample size, sources of biases, confounders, and adherence to reporting guidelines. Three case examples were included to show how eHealth comparative studies are done.

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Appendix. Example of Sample Size Calculation

This is an example of sample size calculation for an rct that examines the effect of a cds system on reducing systolic blood pressure in hypertensive patients. The case is adapted from the example described in the publication by Noordzij et al. (2010) .

(a) Systolic blood pressure as a continuous outcome measured in mmHg

Based on similar studies in the literature with similar patients, the systolic blood pressure values from the comparison groups are expected to be normally distributed with a standard deviation of 20 mmHg. The evaluator wishes to detect a clinically relevant difference of 15 mmHg in systolic blood pressure as an outcome between the intervention group with cds and the control group without cds . Assuming a significance level or alpha of 0.05 for 2-tailed t -test and power of 0.80, the corresponding multipliers 1 are 1.96 and 0.842, respectively. Using the sample size equation for continuous outcome below we can calculate the sample size needed for the above study.

n = 2[(a+b)2σ2]/(μ1-μ2)2 where

n = sample size for each group

μ1 = population mean of systolic blood pressures in intervention group

μ2 = population mean of systolic blood pressures in control group

μ1- μ2 = desired difference in mean systolic blood pressures between groups

σ = population variance

a = multiplier for significance level (or alpha)

b = multiplier for power (or 1-beta)

Providing the values in the equation would give the sample size (n) of 28 samples per group as the result

n = 2[(1.96+0.842)2(202)]/152 or 28 samples per group

(b) Systolic blood pressure as a categorical outcome measured as below or above 140 mmHg (i.e., hypertension yes/no)

In this example a systolic blood pressure from a sample that is above 140 mmHg is considered an event of the patient with hypertension. Based on published literature the proportion of patients in the general population with hypertension is 30%. The evaluator wishes to detect a clinically relevant difference of 10% in systolic blood pressure as an outcome between the intervention group with cds and the control group without cds . This means the expected proportion of patients with hypertension is 20% (p1 = 0.2) in the intervention group and 30% (p2 = 0.3) in the control group. Assuming a significance level or alpha of 0.05 for 2-tailed t -test and power of 0.80 the corresponding multipliers are 1.96 and 0.842, respectively. Using the sample size equation for categorical outcome below, we can calculate the sample size needed for the above study.

n = [(a+b)2(p1q1+p2q2)]/χ2

p1 = proportion of patients with hypertension in intervention group

q1 = proportion of patients without hypertension in intervention group (or 1-p1)

p2 = proportion of patients with hypertension in control group

q2 = proportion of patients without hypertension in control group (or 1-p2)

χ = desired difference in proportion of hypertensive patients between two groups

Providing the values in the equation would give the sample size (n) of 291 samples per group as the result

n = [(1.96+0.842)2((0.2)(0.8)+(0.3)(0.7))]/(0.1)2 or 291 samples per group

From Table 3 on p. 1392 of Noordzij et al. (2010).

This publication is licensed under a Creative Commons License, Attribution-Noncommercial 4.0 International License (CC BY-NC 4.0): see https://creativecommons.org/licenses/by-nc/4.0/

• Cite this Page Lau F, Holbrook A. Chapter 10 Methods for Comparative Studies. In: Lau F, Kuziemsky C, editors. Handbook of eHealth Evaluation: An Evidence-based Approach [Internet]. Victoria (BC): University of Victoria; 2017 Feb 27.
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• Introduction
• Types of Comparative Studies
• Methodological Considerations
• Case Examples
• Example of Sample Size Calculation

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• Comparative Analysis

What It Is and Why It's Useful

Comparative analysis asks writers to make an argument about the relationship between two or more texts. Beyond that, there's a lot of variation, but three overarching kinds of comparative analysis stand out:

• Coordinate (A ↔ B): In this kind of analysis, two (or more) texts are being read against each other in terms of a shared element, e.g., a memoir and a novel, both by Jesmyn Ward; two sets of data for the same experiment; a few op-ed responses to the same event; two YA books written in Chicago in the 2000s; a film adaption of a play; etc. 
• Subordinate (A  → B) or (B → A ): Using a theoretical text (as a "lens") to explain a case study or work of art (e.g., how Anthony Jack's The Privileged Poor can help explain divergent experiences among students at elite four-year private colleges who are coming from similar socio-economic backgrounds) or using a work of art or case study (i.e., as a "test" of) a theory's usefulness or limitations (e.g., using coverage of recent incidents of gun violence or legislation un the U.S. to confirm or question the currency of Carol Anderson's The Second ).
• Hybrid [A  → (B ↔ C)] or [(B ↔ C) → A] , i.e., using coordinate and subordinate analysis together. For example, using Jack to compare or contrast the experiences of students at elite four-year institutions with students at state universities and/or community colleges; or looking at gun culture in other countries and/or other timeframes to contextualize or generalize Anderson's main points about the role of the Second Amendment in U.S. history.

"In the wild," these three kinds of comparative analysis represent increasingly complex—and scholarly—modes of comparison. Students can of course compare two poems in terms of imagery or two data sets in terms of methods, but in each case the analysis will eventually be richer if the students have had a chance to encounter other people's ideas about how imagery or methods work. At that point, we're getting into a hybrid kind of reading (or even into research essays), especially if we start introducing different approaches to imagery or methods that are themselves being compared along with a couple (or few) poems or data sets.

Why It's Useful

In the context of a particular course, each kind of comparative analysis has its place and can be a useful step up from single-source analysis. Intellectually, comparative analysis helps overcome the "n of 1" problem that can face single-source analysis. That is, a writer drawing broad conclusions about the influence of the Iranian New Wave based on one film is relying entirely—and almost certainly too much—on that film to support those findings. In the context of even just one more film, though, the analysis is suddenly more likely to arrive at one of the best features of any comparative approach: both films will be more richly experienced than they would have been in isolation, and the themes or questions in terms of which they're being explored (here the general question of the influence of the Iranian New Wave) will arrive at conclusions that are less at-risk of oversimplification.

For scholars working in comparative fields or through comparative approaches, these features of comparative analysis animate their work. To borrow from a stock example in Western epistemology, our concept of "green" isn't based on a single encounter with something we intuit or are told is "green." Not at all. Our concept of "green" is derived from a complex set of experiences of what others say is green or what's labeled green or what seems to be something that's neither blue nor yellow but kind of both, etc. Comparative analysis essays offer us the chance to engage with that process—even if only enough to help us see where a more in-depth exploration with a higher and/or more diverse "n" might lead—and in that sense, from the standpoint of the subject matter students are exploring through writing as well the complexity of the genre of writing they're using to explore it—comparative analysis forms a bridge of sorts between single-source analysis and research essays.

Typical learning objectives for single-sources essays: formulate analytical questions and an arguable thesis, establish stakes of an argument, summarize sources accurately, choose evidence effectively, analyze evidence effectively, define key terms, organize argument logically, acknowledge and respond to counterargument, cite sources properly, and present ideas in clear prose.

Common types of comparative analysis essays and related types: two works in the same genre, two works from the same period (but in different places or in different cultures), a work adapted into a different genre or medium, two theories treating the same topic; a theory and a case study or other object, etc.

How to Teach It: Framing + Practice

Framing multi-source writing assignments (comparative analysis, research essays, multi-modal projects) is likely to overlap a great deal with "Why It's Useful" (see above), because the range of reasons why we might use these kinds of writing in academic or non-academic settings is itself the reason why they so often appear later in courses. In many courses, they're the best vehicles for exploring the complex questions that arise once we've been introduced to the course's main themes, core content, leading protagonists, and central debates.

For comparative analysis in particular, it's helpful to frame assignment's process and how it will help students successfully navigate the challenges and pitfalls presented by the genre. Ideally, this will mean students have time to identify what each text seems to be doing, take note of apparent points of connection between different texts, and start to imagine how those points of connection (or the absence thereof)

• complicates or upends their own expectations or assumptions about the texts
• complicates or refutes the expectations or assumptions about the texts presented by a scholar
• confirms and/or nuances expectations and assumptions they themselves hold or scholars have presented
• presents entirely unforeseen ways of understanding the texts

—and all with implications for the texts themselves or for the axes along which the comparative analysis took place. If students know that this is where their ideas will be heading, they'll be ready to develop those ideas and engage with the challenges that comparative analysis presents in terms of structure (See "Tips" and "Common Pitfalls" below for more on these elements of framing).

Like single-source analyses, comparative essays have several moving parts, and giving students practice here means adapting the sample sequence laid out at the " Formative Writing Assignments " page. Three areas that have already been mentioned above are worth noting:

• Gathering evidence : Depending on what your assignment is asking students to compare (or in terms of what), students will benefit greatly from structured opportunities to create inventories or data sets of the motifs, examples, trajectories, etc., shared (or not shared) by the texts they'll be comparing. See the sample exercises below for a basic example of what this might look like.
• Why it Matters: Moving beyond "x is like y but also different" or even "x is more like y than we might think at first" is what moves an essay from being "compare/contrast" to being a comparative analysis . It's also a move that can be hard to make and that will often evolve over the course of an assignment. A great way to get feedback from students about where they're at on this front? Ask them to start considering early on why their argument "matters" to different kinds of imagined audiences (while they're just gathering evidence) and again as they develop their thesis and again as they're drafting their essays. ( Cover letters , for example, are a great place to ask writers to imagine how a reader might be affected by reading an their argument.)
• Structure: Having two texts on stage at the same time can suddenly feel a lot more complicated for any writer who's used to having just one at a time. Giving students a sense of what the most common patterns (AAA / BBB, ABABAB, etc.) are likely to be can help them imagine, even if provisionally, how their argument might unfold over a series of pages. See "Tips" and "Common Pitfalls" below for more information on this front.

Sample Exercises and Links to Other Resources

• Common Pitfalls
• Advice on Timing
• Try to keep students from thinking of a proposed thesis as a commitment. Instead, help them see it as more of a hypothesis that has emerged out of readings and discussion and analytical questions and that they'll now test through an experiment, namely, writing their essay. When students see writing as part of the process of inquiry—rather than just the result—and when that process is committed to acknowledging and adapting itself to evidence, it makes writing assignments more scientific, more ethical, and more authentic. 
• Have students create an inventory of touch points between the two texts early in the process.
• Ask students to make the case—early on and at points throughout the process—for the significance of the claim they're making about the relationship between the texts they're comparing.
• For coordinate kinds of comparative analysis, a common pitfall is tied to thesis and evidence. Basically, it's a thesis that tells the reader that there are "similarities and differences" between two texts, without telling the reader why it matters that these two texts have or don't have these particular features in common. This kind of thesis is stuck at the level of description or positivism, and it's not uncommon when a writer is grappling with the complexity that can in fact accompany the "taking inventory" stage of comparative analysis. The solution is to make the "taking inventory" stage part of the process of the assignment. When this stage comes before students have formulated a thesis, that formulation is then able to emerge out of a comparative data set, rather than the data set emerging in terms of their thesis (which can lead to confirmation bias, or frequency illusion, or—just for the sake of streamlining the process of gathering evidence—cherry picking). 
• For subordinate kinds of comparative analysis , a common pitfall is tied to how much weight is given to each source. Having students apply a theory (in a "lens" essay) or weigh the pros and cons of a theory against case studies (in a "test a theory") essay can be a great way to help them explore the assumptions, implications, and real-world usefulness of theoretical approaches. The pitfall of these approaches is that they can quickly lead to the same biases we saw here above. Making sure that students know they should engage with counterevidence and counterargument, and that "lens" / "test a theory" approaches often balance each other out in any real-world application of theory is a good way to get out in front of this pitfall.
• For any kind of comparative analysis, a common pitfall is structure. Every comparative analysis asks writers to move back and forth between texts, and that can pose a number of challenges, including: what pattern the back and forth should follow and how to use transitions and other signposting to make sure readers can follow the overarching argument as the back and forth is taking place. Here's some advice from an experienced writing instructor to students about how to think about these considerations:

a quick note on STRUCTURE

     Most of us have encountered the question of whether to adopt what we might term the “A→A→A→B→B→B” structure or the “A→B→A→B→A→B” structure.  Do we make all of our points about text A before moving on to text B?  Or do we go back and forth between A and B as the essay proceeds?  As always, the answers to our questions about structure depend on our goals in the essay as a whole.  In a “similarities in spite of differences” essay, for instance, readers will need to encounter the differences between A and B before we offer them the similarities (A d →B d →A s →B s ).  If, rather than subordinating differences to similarities you are subordinating text A to text B (using A as a point of comparison that reveals B’s originality, say), you may be well served by the “A→A→A→B→B→B” structure.  

     Ultimately, you need to ask yourself how many “A→B” moves you have in you.  Is each one identical?  If so, you may wish to make the transition from A to B only once (“A→A→A→B→B→B”), because if each “A→B” move is identical, the “A→B→A→B→A→B” structure will appear to involve nothing more than directionless oscillation and repetition.  If each is increasingly complex, however—if each AB pair yields a new and progressively more complex idea about your subject—you may be well served by the “A→B→A→B→A→B” structure, because in this case it will be visible to readers as a progressively developing argument.

As we discussed in "Advice on Timing" at the page on single-source analysis, that timeline itself roughly follows the "Sample Sequence of Formative Assignments for a 'Typical' Essay" outlined under " Formative Writing Assignments, " and it spans about 5–6 steps or 2–4 weeks. 

Comparative analysis assignments have a lot of the same DNA as single-source essays, but they potentially bring more reading into play and ask students to engage in more complicated acts of analysis and synthesis during the drafting stages. With that in mind, closer to 4 weeks is probably a good baseline for many single-source analysis assignments. For sections that meet once per week, the timeline will either probably need to expand—ideally—a little past the 4-week side of things, or some of the steps will need to be combined or done asynchronously.

What It Can Build Up To

Comparative analyses can build up to other kinds of writing in a number of ways. For example:

• They can build toward other kinds of comparative analysis, e.g., student can be asked to choose an additional source to complicate their conclusions from a previous analysis, or they can be asked to revisit an analysis using a different axis of comparison, such as race instead of class. (These approaches are akin to moving from a coordinate or subordinate analysis to more of a hybrid approach.)
• They can scaffold up to research essays, which in many instances are an extension of a "hybrid comparative analysis."
• Like single-source analysis, in a course where students will take a "deep dive" into a source or topic for their capstone, they can allow students to "try on" a theoretical approach or genre or time period to see if it's indeed something they want to research more fully.
• DIY Guides for Analytical Writing Assignments

• Types of Assignments
• Unpacking the Elements of Writing Prompts
• Formative Writing Assignments
• Single-Source Analysis
• Research Essays
• Multi-Modal or Creative Projects
• Giving Feedback to Students

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Writing a Paper: Comparing & Contrasting

A compare and contrast paper discusses the similarities and differences between two or more topics. The paper should contain an introduction with a thesis statement, a body where the comparisons and contrasts are discussed, and a conclusion.

Address Both Similarities and Differences

Because this is a compare and contrast paper, both the similarities and differences should be discussed. This will require analysis on your part, as some topics will appear to be quite similar, and you will have to work to find the differing elements.

Make Sure You Have a Clear Thesis Statement

Just like any other essay, a compare and contrast essay needs a thesis statement. The thesis statement should not only tell your reader what you will do, but it should also address the purpose and importance of comparing and contrasting the material.

Use Clear Transitions

Transitions are important in compare and contrast essays, where you will be moving frequently between different topics or perspectives.

• Examples of transitions and phrases for comparisons: as well, similar to, consistent with, likewise, too
• Examples of transitions and phrases for contrasts: on the other hand, however, although, differs, conversely, rather than.

For more information, check out our transitions page.

Structure Your Paper

Consider how you will present the information. You could present all of the similarities first and then present all of the differences. Or you could go point by point and show the similarity and difference of one point, then the similarity and difference for another point, and so on.

Include Analysis

It is tempting to just provide summary for this type of paper, but analysis will show the importance of the comparisons and contrasts. For instance, if you are comparing two articles on the topic of the nursing shortage, help us understand what this will achieve. Did you find consensus between the articles that will support a certain action step for people in the field? Did you find discrepancies between the two that point to the need for further investigation?

Make Analogous Comparisons

When drawing comparisons or making contrasts, be sure you are dealing with similar aspects of each item. To use an old cliché, are you comparing apples to apples?

• Example of poor comparisons: Kubista studied the effects of a later start time on high school students, but Cook used a mixed methods approach. (This example does not compare similar items. It is not a clear contrast because the sentence does not discuss the same element of the articles. It is like comparing apples to oranges.)
• Example of analogous comparisons: Cook used a mixed methods approach, whereas Kubista used only quantitative methods. (Here, methods are clearly being compared, allowing the reader to understand the distinction.

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What is comparative analysis? A complete guide

Last updated

18 April 2023

Reviewed by

Jean Kaluza

Comparative analysis is a valuable tool for acquiring deep insights into your organization’s processes, products, and services so you can continuously improve them. 

Similarly, if you want to streamline, price appropriately, and ultimately be a market leader, you’ll likely need to draw on comparative analyses quite often.

When faced with multiple options or solutions to a given problem, a thorough comparative analysis can help you compare and contrast your options and make a clear, informed decision.

If you want to get up to speed on conducting a comparative analysis or need a refresher, here’s your guide.

Make comparative analysis less tedious

Dovetail streamlines comparative analysis to help you uncover and share actionable insights

• What exactly is comparative analysis?

A comparative analysis is a side-by-side comparison that systematically compares two or more things to pinpoint their similarities and differences. The focus of the investigation might be conceptual—a particular problem, idea, or theory—or perhaps something more tangible, like two different data sets.

For instance, you could use comparative analysis to investigate how your product features measure up to the competition.

After a successful comparative analysis, you should be able to identify strengths and weaknesses and clearly understand which product is more effective.

You could also use comparative analysis to examine different methods of producing that product and determine which way is most efficient and profitable.

The potential applications for using comparative analysis in everyday business are almost unlimited. That said, a comparative analysis is most commonly used to examine

Emerging trends and opportunities (new technologies, marketing)

Competitor strategies

Financial health

Effects of trends on a target audience

• Why is comparative analysis so important? 

Comparative analysis can help narrow your focus so your business pursues the most meaningful opportunities rather than attempting dozens of improvements simultaneously.

A comparative approach also helps frame up data to illuminate interrelationships. For example, comparative research might reveal nuanced relationships or critical contexts behind specific processes or dependencies that wouldn’t be well-understood without the research.

For instance, if your business compares the cost of producing several existing products relative to which ones have historically sold well, that should provide helpful information once you’re ready to look at developing new products or features.

• Comparative vs. competitive analysis—what’s the difference?

Comparative analysis is generally divided into three subtypes, using quantitative or qualitative data and then extending the findings to a larger group. These include

Pattern analysis —identifying patterns or recurrences of trends and behavior across large data sets.

Data filtering —analyzing large data sets to extract an underlying subset of information. It may involve rearranging, excluding, and apportioning comparative data to fit different criteria. 

Decision tree —flowcharting to visually map and assess potential outcomes, costs, and consequences.

In contrast, competitive analysis is a type of comparative analysis in which you deeply research one or more of your industry competitors. In this case, you’re using qualitative research to explore what the competition is up to across one or more dimensions.

For example

Service delivery —metrics like the Net Promoter Scores indicate customer satisfaction levels.

Market position — the share of the market that the competition has captured.

Brand reputation —how well-known or recognized your competitors are within their target market.

• Tips for optimizing your comparative analysis

Conduct original research

Thorough, independent research is a significant asset when doing comparative analysis. It provides evidence to support your findings and may present a perspective or angle not considered previously. 

Make analysis routine

To get the maximum benefit from comparative research, make it a regular practice, and establish a cadence you can realistically stick to. Some business areas you could plan to analyze regularly include:

Profitability

Competition

Experiment with controlled and uncontrolled variables

In addition to simply comparing and contrasting, explore how different variables might affect your outcomes.

For example, a controllable variable would be offering a seasonal feature like a shopping bot to assist in holiday shopping or raising or lowering the selling price of a product.

Uncontrollable variables include weather, changing regulations, the current political climate, or global pandemics.

Put equal effort into each point of comparison

Most people enter into comparative research with a particular idea or hypothesis already in mind to validate. For instance, you might try to prove the worthwhileness of launching a new service. So, you may be disappointed if your analysis results don’t support your plan.

However, in any comparative analysis, try to maintain an unbiased approach by spending equal time debating the merits and drawbacks of any decision. Ultimately, this will be a practical, more long-term sustainable approach for your business than focusing only on the evidence that favors pursuing your argument or strategy.

Writing a comparative analysis in five steps

To put together a coherent, insightful analysis that goes beyond a list of pros and cons or similarities and differences, try organizing the information into these five components:

1. Frame of reference

Here is where you provide context. First, what driving idea or problem is your research anchored in? Then, for added substance, cite existing research or insights from a subject matter expert, such as a thought leader in marketing, startup growth, or investment

2. Grounds for comparison Why have you chosen to examine the two things you’re analyzing instead of focusing on two entirely different things? What are you hoping to accomplish?

3. Thesis What argument or choice are you advocating for? What will be the before and after effects of going with either decision? What do you anticipate happening with and without this approach?

For example, “If we release an AI feature for our shopping cart, we will have an edge over the rest of the market before the holiday season.” The finished comparative analysis will weigh all the pros and cons of choosing to build the new expensive AI feature including variables like how “intelligent” it will be, what it “pushes” customers to use, how much it takes off the plates of customer service etc.

Ultimately, you will gauge whether building an AI feature is the right plan for your e-commerce shop.

4. Organize the scheme Typically, there are two ways to organize a comparative analysis report. First, you can discuss everything about comparison point “A” and then go into everything about aspect “B.” Or, you alternate back and forth between points “A” and “B,” sometimes referred to as point-by-point analysis.

Using the AI feature as an example again, you could cover all the pros and cons of building the AI feature, then discuss the benefits and drawbacks of building and maintaining the feature. Or you could compare and contrast each aspect of the AI feature, one at a time. For example, a side-by-side comparison of the AI feature to shopping without it, then proceeding to another point of differentiation.

5. Connect the dots Tie it all together in a way that either confirms or disproves your hypothesis.

For instance, “Building the AI bot would allow our customer service team to save 12% on returns in Q3 while offering optimizations and savings in future strategies. However, it would also increase the product development budget by 43% in both Q1 and Q2. Our budget for product development won’t increase again until series 3 of funding is reached, so despite its potential, we will hold off building the bot until funding is secured and more opportunities and benefits can be proved effective.”

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How to Do Comparative Analysis in Research ( Examples )

Comparative analysis is a method that is widely used in social science . It is a method of comparing two or more items with an idea of uncovering and discovering new ideas about them. It often compares and contrasts social structures and processes around the world to grasp general patterns. Comparative analysis tries to understand the study and explain every element of data that comparing. 

We often compare and contrast in our daily life. So it is usual to compare and contrast the culture and human society. We often heard that ‘our culture is quite good than theirs’ or ‘their lifestyle is better than us’. In social science, the social scientist compares primitive, barbarian, civilized, and modern societies. They use this to understand and discover the evolutionary changes that happen to society and its people.  It is not only used to understand the evolutionary processes but also to identify the differences, changes, and connections between societies.

Most social scientists are involved in comparative analysis. Macfarlane has thought that “On account of history, the examinations are typically on schedule, in that of other sociologies, transcendently in space. The historian always takes their society and compares it with the past society, and analyzes how far they differ from each other.

The comparative method of social research is a product of 19 th -century sociology and social anthropology. Sociologists like Emile Durkheim, Herbert Spencer Max Weber used comparative analysis in their works. For example, Max Weber compares the protestant of Europe with Catholics and also compared it with other religions like Islam, Hinduism, and Confucianism.

To do a systematic comparison we need to follow different elements of the method.

1. Methods of comparison The comparison method

In social science, we can do comparisons in different ways. It is merely different based on the topic, the field of study. Like Emile Durkheim compare societies as organic solidarity and mechanical solidarity. The famous sociologist Emile Durkheim provides us with three different approaches to the comparative method. Which are;

• The first approach is to identify and select one particular society in a fixed period. And by doing that, we can identify and determine the relationship, connections and differences exist in that particular society alone. We can find their religious practices, traditions, law, norms etc.
•  The second approach is to consider and draw various societies which have common or similar characteristics that may vary in some ways. It may be we can select societies at a specific period, or we can select societies in the different periods which have common characteristics but vary in some ways. For example, we can take European and American societies (which are universally similar characteristics) in the 20 th century. And we can compare and contrast their society in terms of law, custom, tradition, etc. 
• The third approach he envisaged is to take different societies of different times that may share some similar characteristics or maybe show revolutionary changes. For example, we can compare modern and primitive societies which show us revolutionary social changes.

2 . The unit of comparison

We cannot compare every aspect of society. As we know there are so many things that we cannot compare. The very success of the compare method is the unit or the element that we select to compare. We are only able to compare things that have some attributes in common. For example, we can compare the existing family system in America with the existing family system in Europe. But we are not able to compare the food habits in china with the divorce rate in America. It is not possible. So, the next thing you to remember is to consider the unit of comparison. You have to select it with utmost care.

3. The motive of comparison

As another method of study, a comparative analysis is one among them for the social scientist. The researcher or the person who does the comparative method must know for what grounds they taking the comparative method. They have to consider the strength, limitations, weaknesses, etc. He must have to know how to do the analysis.

Steps of the comparative method

1. Setting up of a unit of comparison

As mentioned earlier, the first step is to consider and determine the unit of comparison for your study. You must consider all the dimensions of your unit. This is where you put the two things you need to compare and to properly analyze and compare it. It is not an easy step, we have to systematically and scientifically do this with proper methods and techniques. You have to build your objectives, variables and make some assumptions or ask yourself about what you need to study or make a hypothesis for your analysis.

The best casings of reference are built from explicit sources instead of your musings or perceptions. To do that you can select some attributes in the society like marriage, law, customs, norms, etc. by doing this you can easily compare and contrast the two societies that you selected for your study. You can set some questions like, is the marriage practices of Catholics are different from Protestants? Did men and women get an equal voice in their mate choice? You can set as many questions that you wanted. Because that will explore the truth about that particular topic. A comparative analysis must have these attributes to study. A social scientist who wishes to compare must develop those research questions that pop up in your mind. A study without those is not going to be a fruitful one.

2. Grounds of comparison

The grounds of comparison should be understandable for the reader. You must acknowledge why you selected these units for your comparison. For example, it is quite natural that a person who asks why you choose this what about another one? What is the reason behind choosing this particular society? If a social scientist chooses primitive Asian society and primitive Australian society for comparison, he must acknowledge the grounds of comparison to the readers. The comparison of your work must be self-explanatory without any complications.

If you choose two particular societies for your comparative analysis you must convey to the reader what are you intended to choose this and the reason for choosing that society in your analysis.

3 . Report or thesis

The main element of the comparative analysis is the thesis or the report. The report is the most important one that it must contain all your frame of reference. It must include all your research questions, objectives of your topic, the characteristics of your two units of comparison, variables in your study, and last but not least the finding and conclusion must be written down. The findings must be self-explanatory because the reader must understand to what extent did they connect and what are their differences. For example, in Emile Durkheim’s Theory of Division of Labour, he classified organic solidarity and Mechanical solidarity . In which he means primitive society as Mechanical solidarity and modern society as Organic Solidarity. Like that you have to mention what are your findings in the thesis.

4. Relationship and linking one to another

Your paper must link each point in the argument. Without that the reader does not understand the logical and rational advance in your analysis. In a comparative analysis, you need to compare the ‘x’ and ‘y’ in your paper. (x and y mean the two-unit or things in your comparison). To do that you can use likewise, similarly, on the contrary, etc. For example, if we do a comparison between primitive society and modern society we can say that; ‘in the primitive society the division of labour is based on gender and age on the contrary (or the other hand), in modern society, the division of labour is based on skill and knowledge of a person.

Demerits of comparison

Comparative analysis is not always successful. It has some limitations. The broad utilization of comparative analysis can undoubtedly cause the feeling that this technique is a solidly settled, smooth, and unproblematic method of investigation, which because of its undeniable intelligent status can produce dependable information once some specialized preconditions are met acceptably.

Perhaps the most fundamental issue here respects the independence of the unit picked for comparison. As different types of substances are gotten to be analyzed, there is frequently a fundamental and implicit supposition about their independence and a quiet propensity to disregard the mutual influences and common impacts among the units.

One more basic issue with broad ramifications concerns the decision of the units being analyzed. The primary concern is that a long way from being a guiltless as well as basic assignment, the decision of comparison units is a basic and precarious issue. The issue with this sort of comparison is that in such investigations the depictions of the cases picked for examination with the principle one will in general turn out to be unreasonably streamlined, shallow, and stylised with contorted contentions and ends as entailment.

However, a comparative analysis is as yet a strategy with exceptional benefits, essentially due to its capacity to cause us to perceive the restriction of our psyche and check against the weaknesses and hurtful results of localism and provincialism. We may anyway have something to gain from history specialists’ faltering in utilizing comparison and from their regard for the uniqueness of settings and accounts of people groups. All of the above, by doing the comparison we discover the truths the underlying and undiscovered connection, differences that exist in society.

Also Read: How to write a Sociology Analysis? Explained with Examples

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Causal Comparative Research: Methods And Examples

Ritu was in charge of marketing a new protein drink about to be launched. The client wanted a causal-comparative study…

Ritu was in charge of marketing a new protein drink about to be launched. The client wanted a causal-comparative study highlighting the drink’s benefits. They demanded that comparative analysis be made the main campaign design strategy. After carefully analyzing the project requirements, Ritu decided to follow a causal-comparative research design. She realized that causal-comparative research emphasizing physical development in different groups of people would lay a good foundation to establish the product.

What Is Causal Comparative Research?

Examples of causal comparative research variables.

Causal-comparative research is a method used to identify the cause–effect relationship between a dependent and independent variable. This relationship is usually a suggested relationship because we can’t control an independent variable completely. Unlike correlation research, this doesn’t rely on relationships. In a causal-comparative research design, the researcher compares two groups to find out whether the independent variable affected the outcome or the dependent variable.

A causal-comparative method determines whether one variable has a direct influence on the other and why. It identifies the causes of certain occurrences (or non-occurrences). It makes a study descriptive rather than experimental by scrutinizing the relationships among different variables in which the independent variable has already occurred. Variables can’t be manipulated sometimes, but a link between dependent and independent variables is established and the implications of possible causes are used to draw conclusions.

In a causal-comparative design, researchers study cause and effect in retrospect and determine consequences or causes of differences already existing among or between groups of people.

Let’s look at some characteristics of causal-comparative research:

• This method tries to identify cause and effect relationships.
• Two or more groups are included as variables.
• Individuals aren’t selected randomly.
• Independent variables can’t be manipulated.
• It helps save time and money.

The main purpose of a causal-comparative study is to explore effects, consequences and causes. There are two types of causal-comparative research design. They are:

Retrospective Causal Comparative Research

For this type of research, a researcher has to investigate a particular question after the effects have occurred. They attempt to determine whether or not a variable influences another variable.

Prospective Causal Comparative Research

The researcher initiates a study, beginning with the causes and determined to analyze the effects of a given condition. This is not as common as retrospective causal-comparative research.

Usually, it’s easier to compare a variable with the known than the unknown.

Researchers use causal-comparative research to achieve research goals by comparing two variables that represent two groups. This data can include differences in opportunities, privileges exclusive to certain groups or developments with respect to gender, race, nationality or ability.

For example, to find out the difference in wages between men and women, researchers have to make a comparative study of wages earned by both genders across various professions, hierarchies and locations. None of the variables can be influenced and cause-effect relationship has to be established with a persuasive logical argument. Some common variables investigated in this type of research are:

• Achievement and other ability variables
• Family-related variables
• Organismic variables such as age, sex and ethnicity
• Variables related to schools
• Personality variables

While raw test scores, assessments and other measures (such as grade point averages) are used as data in this research, sources, standardized tests, structured interviews and surveys are popular research tools.

However, there are drawbacks of causal-comparative research too, such as its inability to manipulate or control an independent variable and the lack of randomization. Subject-selection bias always remains a possibility and poses a threat to the internal validity of a study. Researchers can control it with statistical matching or by creating identical subgroups. Executives have to look out for loss of subjects, location influences, poor attitude of subjects and testing threats to produce a valid research study.

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Comparative Essay

Academic institutions always provide writing exercises to students so that the level of understanding that the students can have about a particular subject manner is widened. One of the most common academic essay examples  that’s given as writing assignment to students is the comparative essay. A comparative essay, also known as comparison essay or compare and contrast essay, is the type of essay that specifically analyzes two subject matters. There are a lot of academic fields where writing a comparative essay can be beneficial to students and their educational undertaking.

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A comparative essay can either compare or contrast two topics, theories, materials and other subjects of discussion. However, there are activities where both comparisons and contrasts are necessary to be presented. If you are required to write a comparative essay but is unaware on how you can do one effectively, you can browse through the samples that we have gathered for you so you can be more knowledgeable on how to structure both the content and layout of this kind of essay.

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The Concept of Comparative Essays

Different  college essay examples  are written based on different sets of instructions. Depending on the writing task that you have at hand, the things that you may include in your comparative essay may vary. However, the concept of making a comparative essay remains the same. For it to be clearer in your mind, here is how a comparative essay works:

• A comparative essay is an academic essay  that requires students to create a comprehensive and precise comparative report about two things.
• A comparative essay is an organized written material that is meant to provide a comparison that should be easily understood by the target readers. It is set to impress people by providing them the information that they need to be aware of about two subjects and how they differ and/or compare with each other.
• A comparative essay can be written if you have two objects or subjects that can be compared in a level where their similarities and/or differences are relevant or meaningful for a specific purpose.
• A comparative essay can be used in formal writing assignments and it can also be the basis for various research assessments.
• A comparative essay is created through pertaining precise points of comparison. These points should be backed by actual researchers, factual information, and other reliable evidence.

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How to Develop the Content of Your Comparative Essay

Before writing a comparative essay, you first need to arm yourself with the information that you need. This will allow you to create a comparative essay that is filled with relevant and helpful information. More so, this can help you veer away from committing  common essay mistakes  if you are already in the process of actual content writing.

The way that you plan to present your ideas, especially if they are backed up with facts, can make your comparative essay more successful. Listed below are the steps that you may use when developing the content of your comparative essay.

• The first thing that you need to do is to be aware of the question that you need to answer. You need to be aware of the essay prompt so you can address the needs of your readers. It is essential for you to be fully knowledgeable of the essence of the question so you can interpret it accordingly. The content that you will write will only be effective if it is related to the question and if it matches the purpose on why the essay is necessary to be written.
• Know whether there are limits for your discussion . Always identify whether you need to know the similarities or the differences between your subjects. Also, you need to know whether the scope of your essay assignment requires you to do any of these or both.
• Select the ideas that you would like to compare. It is important for you to have an in-depth understanding of the kind of comparison that you will write. The framework of your essay should be based on an actual evaluation that can point out how you were able to perceive the similarities or differences of the subject.
• Assess whether you already have sufficient points for comparison. Your ability to present as many valid points as possible can make a lot of clarifications about the unanswered questions that you can enlighten your readers with.
• Once the points of your comparison are already specified, list down whether they are under the similarities or differences of the two subjects. This step can help you be organized throughout the writing process. With easy access to how subjects are compared, you can be guided on how to use them in your content development.
• Evaluate your list. Your list is only your initial view about the subjects being reviewed or assessed. Hence, further evaluation is necessary. Make sure that you will read through the entire list so you can rank them based on their impact and weight of thesis.
• Chronologically arrange your list based on your basis of comparison . Make sure that you will follow a metric when examining the items that you will place in your actual comparative essay.
• Know the approach that you will use when developing your essay content. Will you be theoretical? Will you focus on answering questions for comparison? It is essential for you to be aware of your basis so your approach can provide you with maximum benefits within the entirety of the content development process.
• Research further about your subjects so you can verify whether your claims and initial claims are correct. This can help you create more topics and gather more evidence that can support your comparison.
• Create a thesis statement where your discussion can set its foundation. This will enable you to start writing the comparative essay that you would like to achieve.

You may think that this is a very long process just for developing the ideas that you will present. In a way, you may be right. However, being prepared and ready on how you will attack and execute the writing assignment can make it easier for you to create a valid discussion.

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Steps in Organizing Your Comparative Essay Discussion

Aside from knowing the idea of what you will write about, the structure of your essay or the organization of your essay’s content can affect the smooth flow of your discussion. Even during  last minute essay writing  activities, you can still come up with an outstanding comparative essay if you are already knowledgeable on how you can organize your essay’s idea, content, structure, and discussion. Listed below are some of the ways on how you can efficiently organize your comparative essay’s content.

• Refer to the outline of your comparisons. This is where the items that we have discussed above can be helpful. If you are already guided by your comparisons, then you can easily rank their relevance to the essay that you will write. Referencing your comparisons can make it easier for you to have a thesis statement that you can further discuss.
• Organize your writing strategies. The strategies that you will incorporate into your discussion can make it easier for readers to relate to your point. You need to make sure that your strategies are aligned with your type of comparison and the subjects that you are comparing.
• Properly address your comparisons.  For your comparative essay to be highly-usable, you need to make sure that you will implement simplicity within your discussion. Do not make it complicated. The content of your comparative essay should be as simple as possible so that it can be furthermore understood.
• Organize your paragraph structure.  The way that you create your paragraph listing can be one of the factors that can either improve or destroy your comparative essay. You should create a draft that can specifically state the items that you will discuss per paragraph. Create statements that can address specific comparisons and divide them per paragraph. Each of your paragraphs should be talking about one subject so you can give focus per comparison aspect.
• Evaluate whether your writing guide is already organized enough. It is essential for you to not overlap subjects of discussion. When organizing your statements, make sure to cover one subject at a time. This will help you create a comparative essay that contains a list of carefully arranged and curated evidence which are further discussed and broken down into relevant specification pieces.

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Writing Guide in Creating the Actual Comparative Essay

Just like  descriptive essay examples  and other kinds of academic essays, a comparative essay can be created in different ways. Each writer has various techniques that can be applied when doing this particular kind of essay. Since there are no strict rules when it comes to crafting a comparative essay, all you need to ensure is that your comparative essay is comprehensive, understandable and credible. Here is how you can effectively write your actual comparative essay:

• Create an introduction to the topic. Your thesis statement should contain the subjects that you will talk about. You also need to create an initial discussion of what your readers can expect to the reader within the content of your comparative essay. A strong validation of your comparison can make your readers more interested to browse through the entire essay document.
• Develop your next paragraphs for discussion. As mentioned above, work per paragraph. Arrange your topics of discussion in a way that each paragraph can specifically state one comparison topic per time. You have to create an interesting discussion so you need to ensure that all your paragraphs are organized and well-written.
• Finalize your comparative essay with a conclusion. Your last paragraph should contain the information about your final thoughts with regards the comparison. How different or similar are the two subjects from one another? How sure are you that your basis is factual and relevant? Create a great impact b
• y having a conclusion that can put together all your points of discussion.

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Factors to Consider When Writing a Comparative Essay

In comparison to  evaluation essay examples , a comparative essay is more keen with regards the assessment of two subjects. If you will write a comparative essay, you need to have an idea of the impacts of different factors to the result that you may get at the end of the writing activity. Listed below are some of the elements or factors that you need to take into consideration when writing a comparative essay.

• Your discussion’s organization.  Within the entirety of the comparative essay creation, it is very evident that organization is key to success. As a writer, you need to ensure that you have a skeletal plan that can create your discussion more polished and coherent. The discussion of your organization can greatly affect the impression of your readers with regards your knowledge about your topic as well as your level of understanding with what you are talking about.
• Your thesis statement.  When creating a comparative essay, you need to stick with an argument that can provide you the framework for the effective dissemination of information. Your thesis statement should be based on the results of your frame of references. You need to analyze your subjects properly so that you can create a stand on how you perceive them in levels of similarities and/or differences.
• Your claims or grounds for comparison.  You should always be aware of your selection processes. At the end of the writing activity, you need to validate the importance of comparing two subjects. Always have your grounds of comparison ready so you can ensure your readers that you have followed a particular set of criteria that can enable the objectivity between the selection of two items for comparison. The rationale that you have behind your subject selection can make your comparative essay more appealing.
• Your reference frame.  A comparative essay’s frame of reference deals with the way that the writer has created the groupings for the comparison. May it be talking about the similarities, differences, or both of these factors; a comparative essay should be able to have a reference that can identify how the characteristics of ideas, themes, theories or even problems are arranged.

With the samples that we have in this post, it will be faster for you to identify the points of discussion that you need to provide. Again, comparative essays vary from one another in terms of content. Ensure that you are fully aware of the writing instructions given to you so you can plan your comparative essay’s content and structure accordingly.

Always refer to the guidelines and tips that we have specified so you can create effective decisions in every step of your comparative essay development. Do not be afraid to write what your thoughts. As long as these thoughts are based on factual references, then it will be easy for you to have a comparative essay that can achieve its purpose or reason for creation.

the art of writing a comparative essay lies in the delicate balance of presenting similarities and differences in a clear, coherent manner. This type of essay encourages critical thinking and develops analytical skills, crucial for academic success. For further guidance on creating effective comparative essays, the UNC Writing Center offers a detailed resource on comparing and contrasting ( UNC Writing Center ). This link provides valuable insights and examples, helping students refine their comparative writing skills. By mastering the comparative essay, students not only enhance their writing abilities but also deepen their understanding of contrasting subjects, an essential skill in many academic and professional fields.

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Comparative History Research Paper

Sample Comparative History Research Paper. Browse other research paper examples and check the list of research paper topics for more inspiration. iResearchNet offers academic assignment help for students all over the world: writing from scratch, editing, proofreading, problem solving, from essays to dissertations, from humanities to STEM. We offer full confidentiality, safe payment, originality, and money-back guarantee. Secure your academic success with our risk-free services.

Comparative history differs from other historical methods in that it takes an explicit line of questioning to compare two or more cases stemming from different contexts. The aim of this operation is either to bring out the similarities and differences of the different cases, or to determine the scope of social scientific theories or theoretical approaches. Seldom does comparison itself lead to the formulation of theories. These characteristics distinguish historical comparison monographic work concentrating on case studies, from historical syntheses with an international scope and from implicit comparison, which indeed belongs among the analytical instruments of all historical work.

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Get 10% off with 24start discount code, 1. the story of ‘comparative history’.

Although the comparative perspective has appeared repeatedly in the history of historiography, it has only presented itself as a methodical instrument of explicit theoretical comparison since the 1930s. Of course, the historiography of the Enlightenment made use of comparison in its endeavor to grasp the specific characteristics of the historical process by means of universal historical types; in this context, Montesquieu, Adam Smith, and the Cameralist J. H. G. Justi should be mentioned. In Scottish, English, French, and German Enlightenment literature as well, cultural areas and development stages were compared. Thus, just as the demarcation of the European model against non-European civilizations in the eighteenth century belonged to the arsenal of universal history, so did the belief that developed societies can trace their own history in that of less-developed societies (e.g., Karl Marx). In this attempt, development thinking became closely intertwined with a Eurocentric perspective. This universal historical tradition persisted, carried on in the twentieth century by such diverse authors as Oswald Spengler and Arnold Toynbee, Karl Polanyi, and Schlomo Eisenstadt.

Modern comparative history, however, is not rooted in this tradition. Profoundly affected by the experience of World War I and the traumas suffered by parts of academia under nationalistic exclusionism, comparative history established its argument for comparison as a fruitful enterprise particularly based on the results produced in neighboring sciences. Henri Pirenne, a Belgian historian and one of the pioneers of inter-nationally comparative historiography, did admittedly make reference to universal history in his opening speech at the fifth international conference of historians in Brussels in 1923, but with the intention of combating the narrowness of purely national perspectives and the subjection of historical research to functional ends. However, Marc Bloch and Otto Hinzte, two of the most influential forerunners in the field of comparative study, were even more active in taking up approaches from neighboring disciplines where comparison had long been a commonly practiced method. Historiography, as a historically comparative discipline, was a latecomer compared with other sciences. In fact, as early as the late eighteenth and early nineteenth centuries, various sciences had practiced comparative study successfully. Such works were produced not only in anatomy and physiognomy, but also in religious studies, jurisprudence, geography, and philosophy. Among them was that of F. Max Muller, the first Introduction to the Science of Religion, published in 1873. Thus it was no coincidence that Marc Bloch, in his 1928 essay advocating the practice of comparative history, does not cite historians, but rather Antoine Meillet and the broad range of scholars who had been carrying out internationally comparative linguistic research since as early as the nineteenth century.

In the development of modern comparative history, contact with the social sciences played the central defining role. Marc Bloch, whose works on the ‘royal touch,’ on the agrarian history of England and France, and on the different forms of feudal society in Europe up to 1940 provided important examples of comparative study, had received theoretical stimuli, above all from Emile Durkheim. Durkheim saw comparison as the sociological method par excellence, enabling the delineation of the fundamental characteristics of social types. Bloch used this method, for example, in his analysis of feudal society when he concentrated on its dominant dependency relationships. Otto Hintze, who was among the pioneers of historical comparison, also took the work done in the social sciences as his model. He adopted the concept of the ideal type from Max Weber and went on to construct an ideal-type concept of feudalism. He then applied this to the various manifestations of feudal domination, which he found to be particularly pronounced in Russia, Japan, and the Islamic countries.

In the period following World War II in particular, the number of theoretically based works with an internationally comparative perspective increased. The science of history bore a complex interrelationship to historical sociology. On the one hand, it profited from the broad scope of sociology’s macro comparisons, which were limited neither to a specific epoch nor to a specific continent. These comparisons studied different national cases, using stringent argumentation to examine theoretical questions. Thus Barrington Moore inquired as to the role of agrarian development in the emergence of either democracy or dictatorial fascistic regimes in a broad comparison of six national cases, while Jack Goldstone compared revolutionary crises of the early modern age in Europe and Asia. On the other hand, however, it was only the historical research in monographic form that made available to historical sociologists the theses and research results that would enable them to carry out extensive comparisons. The stimuli obtained from historical sociology were also accompanied by critique of its generalizations and its handling of the historical state of research, which it did not always improve upon extensively. Nevertheless, historical sociology pro-vided an important stimulus to comparative history. Its works elicited an increasingly favorable response in the 1960s to the extent that history was open to theoretical questions, and gradually after 1970, these works were also emulated.

The theory of modernization, which originated mainly in the United States in the 1950s, provided a powerful comparative impetus as well, and elaborated parameters of development against which it measured individual societies. The successful combination of market economy and political democracy was its criterion for modernity. In this sense, the vague but positively cast concept of ‘modernity’ was used widely in historiography on the nineteenth and twentieth centuries; it emphasized structures, functions, and interdependencies among the different parts of systems more strongly than their historical individuality. In individual historiographies—particularly in those countries catching up in industrial and political development—the comparison to the Anglo-Saxon ‘leader’ countries soon became one of the standard lines of argumentation. In the West German debate about the long-term and medium-term causes of National Socialism, structural deficits were identified in comparison to Anglo-Saxon development, which itself was admittedly highly typological and idealized: these included the feudalization of the German middle classes, a general deficit in the middle-class way of life, the exceptional proximity of middle-class life to the state, and the persistence of privilege-based social orders in the old and new middle class. Especially in this debate about Germany’s Sonderweg (‘unique path’)—but in Italian historiography as well—it was no longer just the linear and unceasing advance toward modernity that was at issue, but the ruptures, contra-dictions, and deficits in the development.

Within the science of history, comparative methods by no means penetrated all disciplines to the same degree or simultaneously. They emerged earlier in economic history, population history, and political history than in social history, gender history, or cultural history. As early as 1957, the Economic History Association dedicated one day of its annual conference to comparative economic history, and it was no coincidence that one year later, economic historian Sylvia Trupp founded the journal Comparative Studies in Society and History with the expressed goal of publishing studies of an inter-disciplinary and comparative nature. In Europe, the English model of industrialization and its spread was the central topic of the comparative studies that appeared even before 1960. The most broad-based and influential comparative analysis was produced by Alexander Gerschenkron, who studied the basic similarities and differences within the European process of industrialization, inquiring into not just the different answers to similar challenges, but also the functional equivalents among European societies. He explains the differences in development on the basis of both the specific position of the individual economy in the system as a whole (‘relative backwardness’) and the influences generated by developed societies. Walt Rostow’s ‘stage theory’ of economic growth also provided an impetus to comparative economic history after 1960, as did Simon Kuznets’s quantitative studies. Rostow’s thesis that every society has to go through similar phases of economic growth and that therefore each society’s position can be identified against this background was almost a direct invitation for checking by historical comparison. Kuznets, in contrast, instead emphasized the uniformity of modern economic growth, although without ignoring its national diversity. His three-sector thesis also led to comparative studies.

In historical demography, in 1963 at Princeton, Ansley Coale began comparing 600 European regions to answer the question of whether and why the birth rate was declining in Europe; this was called the European Fertility Project. Although the project did produce convincing demographic results, the ex-planation of demographic behavior on the basis of historical macro processes came under criticism. The reasons for the early comparative studies of political movements and institutions can be found not only in the field of ‘comparative politics,’ which gained importance in the USA in the 1960s, but also—according to Klaus von Beyme—in a unique approach to research within political science. This approach applies to institutions that can be classified under the general type of democratic systems, but that nevertheless take on specific forms. Research on resistance movements and on social systems or constitutions paved the way for the advancement of comparison in social history .

Nevertheless, since the mid-1960s, sociohistorical comparison has taken on a leading role, showing a remarkable breadth of research and differentiation in approaches. In Europe, at least a handful of papers have been published every year since 1970 on comparative social history, none limited to a specialized area, but including the history of the family and social classes, and the development of the social state, the city and education. These studies have been focused mainly on three central issues. First, they deal with the explanation of national peculiarities, which often— because of political events—are seen as characteristic of the social development of the last few centuries. In the debate about the German Sonderweg, this orientation of comparative sociohistorical research has taken its most comprehensive and probably also most fruitful form as a scientific heuristic device. Second, they focus on the different pathways of individual European societies into the modern age: their distinctive features are identified above all in comparisons between different societies, and between European and non-European cultures. A third focal point has been the European model and its social characteristics. All these studies have demonstrated methodical diversity in both quantity and in quality; have integrated social, political, and economic factors; and have focused attention on both linear and cyclical developments. Furthermore, they have compared societies as well as parts of societies.

European historiographies have not all made use of the comparative method to the same degree. Surprisingly, Marc Bloch’s appeal in France went unheard for many years, as French historiography was and continues to be strongly oriented toward monographic work and highly skeptical of theory. In Great Britain as well, historical comparison did not catch on because of the dominance of national history and the distance from the social sciences. In Italy, comparative history remained on the periphery—despite the proximity of many historians to debates in the social sciences— because of the strong regional orientation. In West Germany, Scandinavia, Switzerland, and Austria comparative work remained rather limited within total historical production, even though the number of comparative works was significantly higher than the number of other European historiographies. Although sociohistorical comparison was particularly strong in Germany, this was a result of both debate on the theory of the German Sonderweg, which was dealt with in many comparative historical essays, and the explicit discussions of social-scientific theories and proposed explanations that characterized modern German social history. In general, one may assume that internationally comparative history had a difficult time gaining a foothold wherever the relation to theory was weak, and wherever attempts to explain national patterns of development in the philosophy of science remained only peripheral. Before 1989, this was the case in Iberian societies as well as in Eastern Europe.

The study of history in the United States, where, according to Raymond Grew, comparison is a weak point rather than a strong one, has not only brought forth a series of excellent comparative studies on European history, but also practices transepochal and transatlantic comparison more intensively than does European historiography. Among the comparative works on Europe, those of Charles Tilly, Peter Baldwin, and Susan Pederson are particularly worthy of mention. The study by Arno Mayer on the Holocaust, which he sees in the tradition of the Crusades and the Thirty-Years’ War, takes a trans-epochal and internationally comparative approach and presents a comparative tableau of the situation of Jewish people in Eastern European societies in the 1930s. Transatlantic perspectives are opened up by those studies that place slavery in the South, the frontier problem, and the situation of migrants in a larger, multinational context.

In gender history, the comparison of male and female roles was for a long time the constitutive element of analysis, and only recently have theoretical, internationally comparative studies been produced. These have concentrated on institutions or sub-areas which, like social laws, have attained a special meaning for gender roles. Modern cultural history as well, which discusses the creation and relevance of stems of meaning, rituals, and symbols, has concentrated thus far on national configurations and ascribed little importance to international comparison.

In historiography on classical antiquity, the Middle Ages, and the early modern age, comparative studies were carried out, comparing rulers, regimes, and individual institutions. Because of the international character of political systems, the national aspect decreased in importance as a unit of comparison. However, theoretically oriented comparisons remained scarcer in this area than in the historiography on modernity.

2. Functions Of Historical Comparison

The comparative method pursues two goals alternately. On the one hand, it seeks to accentuate the distinctive feature of each individual case, and on the other, attempts to derive evidence on general developments from case studies. While historians tend toward the first approach, the second is more prevalent among social scientists. Comparative historical studies do, however, also deal with the question of commonalities. Four functions are granted to comparison in these studies: a heuristic function, a contrastive function, an analytical function, and a distancing function.

Comparison plays a heuristic role when it alone can offer explanations and reveal phenomena that had been unknown or inadequately known up to that point. This function was already referred to by Marc Bloch, who, based on his knowledge of the English enclosure movement, sought an equivalent in French agrarian history. Founding his thesis on research in regional history, he dates the disappearance of collective rights in Provence as early as the fifteenth century, and concludes from this that similar movements took place in France not only earlier, but also under other conditions. Thanks to the comparative method, Bloch was able to discover a characteristic of French agrarian development through his studies of the agrarian history of other countries.

Historical comparison can be called contrastive when it serves to define more precisely the special features of a specific case. Above all in German– French comparison, this method was used to bring into bold relief the particularly xenophobic character of German nationalism in the early nineteenth century, the insurance character of Germany’s social security system, and its unique characteristic of having a highly educated middle class. Comparison of Italian and Anglo-Saxon developments brought out the regressive state of Italian industrial development, its lack of a modern party system, and its unique feature of having a patrician, noble class. Depending on the country selected for comparison and the logic behind this comparison, specific characteristics of the mostly isolated national case but also of regional patterns of development are illuminated and brought into clear contrast against the totality. At least two problems emerge in this endeavor: the further the development stage in the reference country or region deviates from the individual case in question, the less suitable it is for defining the specifics of the case beyond mere identification of general deficits. If one measures the economic development in Italy in the nineteenth century using as a yardstick the conditions that promoted industrialization in England, one can only determine that these conditions were lacking in Italy, but cannot identify the specific conditions for the economic growth that took place there. The more that the comparative reality is used merely as a foil to highlight the contours of a specific case, the more typological and reductive the resulting picture. International case studies written in comparison to the German case with the aim of presenting a general view of the livelihood and benefits of German white-collar employees have only rarely provided convincing analyses of the individual national developments in the employee milieu. This inherent bias of comparison should be borne in mind in each case.

Comparison has an analytical character when it either tests a scientific hypothesis or identifies constellations of causes in a specific situation. The thesis that a causal relationship exists between capitalism and feudalism is relativized by the fact that strong fascist movements did not emerge in all capitalist societies; they were able to develop only under specific conditions. Jurgen Kocka qualified this assumption in his comparison of American and German society between the two World Wars. In a study of the French, Russian, and Chinese revolutions, Theda Skocpol inquired as to the results of collapsed administrative apparatuses, broad peasant rebellions, and movements among political elites, thereby demonstrating the extreme diversity in the constellations of causes which explain the outbreak of modern revolutions.

In this analytical approach, comparison can also serve as an indirect experiment. When phenomenon a is ascribed to cause b, the historian can test their hypothetical connection by looking for constellations in other societies in which a appears without b, or where b exists without leading to a. This heuristically useful procedure is distinguished from experiments in the natural sciences in that here, the ceteris paribus conditions are seldom given.

Comparison has a distancing effect when it offers another perspective to observation and analysis. It can produce surprising discoveries as well as relativizing the tradition-based context of national historiographies. Especially for those historiographies that are deeply embedded in a national context, comparison can open up new and often broader vistas. When confronting comparisons with other reference cases— especially those from other cultures—not only does one gain experience with different types of question and method, but also fundamental assumptions of one’s own historiography can be revealed and their problems expounded. The comparative view can also contribute new insights: Skocpol, for example, uses the comparative method to shed new light on the similarities between the French Revolution of the eighteenth century and the Chinese revolution of the twentieth century in her comparison of revolutions, and between the cities of France and Japan in the eighteenth century. Taking into consideration the variety of alternative pathways into the modern age prevents exclusive concentration on the European development path, and offers insight into those conditions of European development which cannot be generalized.

3. Methodology Of Comparison

Although comparative history does not possess its own methodology, it does present particular methodo-logical problems in bold relief.

Historians have used the proximity of their work to original sources as a special proof of its scientific nature. The goal of reconstructing history via a multitude of sources in as comprehensive a manner as possible is one of the fraternity of historians’ standards. This fundamental methodological principle to a certain degree evades historical comparison. In so far as it compares more than two cases, it depends more heavily on secondary literature than on the evaluation of a consistent body of sources. Thus, it also faces the problem of having to assess adequately the historiographic context, where each individual work of secondary literature interprets the original sources in its own specific way.

Another of the principles of historical study is that individual aspects of reality cannot be understood separately from their place within a totality or within a historical development. The full meaning of details comes into focus only when looked at in synchronic and diachronic perspective. The method of isolating variables—a common one in empirical social research and political economy—can and should be used within the framework of research projects, but is inadequate for representing the results of research. Comparisons can trace diachronic development processes in their similarities or differences, but they can also examine trans-epochal cases along one specific line of questioning. For example, Raymond W. Goldsmith studies the premodern financial systems in ancient Mesopotamia, the Indian Mogul empire, and England under the rule of Elizabeth I. For him, what is of interest is not how an epoch can be characterized, but the contribution of different states and ages to a central line of questioning. Comparison can also evade both chronology and the total context in question: one separates out the individual cases, subjects them to examination from a specific perspective, reduces their complexity, and studies them as exemplary cases belonging to a ‘universal,’ the tertium comparationis. Because of this isolation and reduction, the methodology of comparison enters into a relationship of unresolvable tension with fundamental principles of historical study. What has proven to be a rule of thumb is that the loss of context in comparative study is less severe the smaller the number of reference cases. By choosing medium-range theories and argumentation on a moderate level of abstraction, one limits as far as possible both the loss of concreteness and the distance from the object of study. To do justice to the diverse kinds of relationship affecting a particular case, comparative historical studies include processes rather than constellations, and link the analysis of individual situations with questions derived from the historical study of relationships. The integration of individual cases into the total social context can be intensified through close attention to the linguistic and conceptual specifics that define and influence these contexts.

Despite all of these methodical problems, historical comparison also has a positive impact on historical research by raising its consciousness about the extent and limits of different approaches, the implicit premises of scientific study, and the coherence of the total context. It opens up historical study to theoretical reflection.

The unit of comparison changes according to the line of questioning and the information being sought. For a long time, a national framework of study was dominant in the science of history, both because this framework influenced the problems being studied, and also because answers to questions of national history were sought in comparison. Research on nationalism and welfare states, democracy and religious denominations have been given a privileged place in the national framework. This national approach has been called into question by two developments: micro-history and intercultural history.

Microhistory has brought increased interest to local, often unique sources and problems which give a privileged role to the viewpoints of the people involved, and which—because of the emphasis on individuality—had been excluded previously from methodical comparison. In addition, this shows the importance of another area which calls into question the self-assuredness of past research on national historical developments. For the study of family constellations and famine unrest, local frameworks present themselves as the most appropriate, while for the analysis of linguistic dialects or industrialization, the regional level is preferable. As the study of history becomes increasingly global, the national level will decrease continuously in significance. This does not just apply to colonialism, the migration movements of the nineteenth and twentieth centuries, or the global economy that has been developing since 1880. Marc Bloch pointed out as early as 1928 that the development of manorial rule in the Middle Ages and early modern age in individual localities and regions cannot be understood independently of the decline of money rent throughout Europe.

In so far, then, as one seeks to identify the special features of Europe’s development, it is necessary to include non-European cultures, which, however, should no longer serve merely as a foil as they did for Max Weber, but rather be examined with a differentiated view to their independence and specificity. In order to obtain a new perspective, Jurgen Osterhammel proposes a new approach: instead of analyzing non-European cultures from a European standpoint, one should take the opposite point of view and determine European specifics from the stand-point of non-European cultures. The methodical problems of such a perspective are as obvious as its advantages: these include on the one hand problems of languages, the knowledge of often very different historiographies, and aggregation of data that de-crease in meaningfulness and are often statistically antiquated, and on the other, a new view of known developments, and the opening of a wider sphere of activity and relationships.

In particular, the history of transfer processes brought attention to Galton’s problem of ethnologies when it questioned whether two or more cases can really exist independently alongside one another, or if they are enmeshed in a visible or invisible web of relationships that influence them decisively. The question of how specific constellations develop through direct influence, appropriation or imitation of foreign models does indeed increase the complexity of comparison, but in no way replaces it. As is well known, Marc Bloch extolled the study of societies in the same epoch which are neighboring, mutually influential, and subjected to the same macro changes as one of the ideal methods of historical comparison.

4. Comparative History’s Agenda And Unsolved Problems

Comparison poses methodical and theoretical problems for the science of history, but at the same time challenges it, and can even work as a factor to increase method-consciousness and support theoretical reflection. Currently, an expansion of previous approaches and fields of comparison in the following directions could be considered:

Until now, comparative studies have limited them-selves to defining the range and meaningfulness of theories. Such problems as whether Weber’s class theory is appropriate for the history of the European middle class, whether Pierre Bourdieu’s concept of cultural capital is useful for an analysis of intellectuals, or whether Marx’s theory can be applied to modern revolutions—and whether all of these can explain more than just national cases—have been the focus of interest thus far. However, the question of what changes must be made in theoretical concepts if they are to explain more than one national development and encompass a multitude of empirical cases has seldom been asked. Therefore, comparative history has contributed little to the development of theory thus far, and has seldom taken the step to formulate theoretical alternatives by relativizing existing approaches.

In historical comparison, progressive types and structures—rather than the constitutive processes of historical facts and materials—were, for a long time, at the center of attention. With the increasing importance of constructivist approaches, individual sources such as reports and statistics are being interpreted to be more a representation of individual administrations or rulers than an account of social or political reality. Comparisons that strengthen this point of view would involve representations and strategies of representation, and prevent the naive use of sources and statistics. In this area, new fields of research are opening up.

In numerous comparative studies, the process of modernization is built in as the tertium comparationis. This enables that the trajectory of development of each particular case be identified and defined. The more that temporally staggered comparisons are used in these studies, however, the less importance they ascribe to synchronic observation and the more they ascribe to the content of the line of questioning. In this way, comparison concentrates less on the characterization of phases of historical development, and more on different contexts—such as collectives’ self-descriptions, social placement strategies, ascription of religious meaning—which it analyzes for several collectives.

Contemporary processes of globalization have left their mark above all on the capital and labor markets, but have also called into question the national contexts of thinking prevalent in the sciences. On the one hand, historiography in the European framework reacts to this relativization of the national: it can give a privileged role both to comparison between individual societies as well as to the homogeneity of powerful forces and processes. Transcultural comparison with non-European cultures also presents a promising means of isolating and identifying the factors of Europe’s development. On the other hand, the individual societies themselves have become complex ‘melting-pots,’ as reception and diffusion of cultural models, social modernization, and social and cultural coding have merged in them, accompanied by national-historical and global-social influences. With the increasing demand for an adequate survey of contemporary society, the demands placed on a theoretically based, methodically differentiated comparative history will increase as well, expanding the spectrum of questions with which history will be interpreted.

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• Hintze O 1964 Soziologische und geschichtliche Staatsauffassung. In: Oestreich V G (ed.) Soziologie und Geschichte— Gesammelte Abhandlungen. Gottingen, Vol. 2, pp. 239–305
• Kaelble H 2000 Der historische Vergleich. Frankfurt, Germany
• Kocka J 1977 Angestellte zwischen Faschismus und Demokratie. Zur politischen Sozialgeschichte der Angestellten, USA 1890– 1940 im international Vergleich. Gottingen, Germany
• Mayer A 1988 Why Did the Heavens Not Darken? The ‘Final Solution’ in History. New York
• Moore B 1966 Social Origins of Dictatorship and Democracy. Lord and Peasant in the Making of the Modern World. Boston Passatove presente, 1993, Vol. 28
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34 Compelling Compare and Contrast Essay Examples

Topics cover education, technology, pop culture, sports, animals, and more.

Do your writers need some inspiration? If you’re teaching students to write a compare and contrast essay, a strong example is an invaluable tool. This round-up of our favorite compare and contrast essays covers a range of topics and grade levels, so no matter your students’ interests or ages, you’ll always have a helpful example to share. You’ll find links to full essays about education, technology, pop culture, sports, animals, and more. (Need compare-and-contrast essay topic ideas? Check out our big list of compare and contrast essay topics! )

What is a compare and contrast essay?

• Education and parenting essays
• Technology essays
• Pop culture essays
• Historical and political essays
• Sports essays
• Lifestyle essays
• Healthcare essays
• Animal essays

When choosing a compare and contrast essay example to include on this list, we considered the structure. A strong compare and contrast essay begins with an introductory paragraph that includes background context and a strong thesis. Next, the body includes paragraphs that explore the similarities and differences. Finally, a concluding paragraph restates the thesis, draws any necessary inferences, and asks any remaining questions.

A compare and contrast essay example can be an opinion piece comparing two things and making a conclusion about which is better. For example, “Is Tom Brady really the GOAT?” It can also help consumers decide which product is better suited to them. Should you keep your subscription to Hulu or Netflix? Should you stick with Apple or explore Android? Here’s our list of compare and contrast essay samples categorized by subject.

Education and Parenting Compare and Contrast Essay Examples

Private school vs. public school.

Sample lines: “Deciding whether to send a child to public or private school can be a tough choice for parents. … Data on whether public or private education is better can be challenging to find and difficult to understand, and the cost of private school can be daunting. … According to the most recent data from the National Center for Education Statistics, public schools still attract far more students than private schools, with 50.7 million students attending public school as of 2018. Private school enrollment in the fall of 2017 was 5.7 million students, a number that is down from 6 million in 1999.”

Read the full essay: Private School vs. Public School at U.S. News and World Report

Homeschool vs. Public School: How Home Schooling Will Change Public Education

Sample lines: “Home schooling, not a present threat to public education, is nonetheless one of the forces that will change it. If the high estimates of the number of children in home schools (1.2 million) is correct, then the home-schooling universe is larger than the New York City public school system and roughly the size of the Los Angeles and Chicago public school systems combined. … Critics charge that three things are wrong with home schooling: harm to students academically; harm to society by producing students who are ill-prepared to function as democratic citizens and participants in a modern economy; and harm to public education, making it more difficult for other parents to educate their children. … It is time to ask whether home schooling, charters, and vouchers should be considered parts of a broad repertoire of methods that we as a society use to educate our children.”

Read the full essay: Homeschool vs. Public School: How Home Schooling Will Change Public Education at Brookings

Which parenting style is right for you?

Sample lines: “The three main types of parenting are on a type of ‘sliding scale’ of parenting, with permissive parenting as the least strict type of parenting. Permissive parenting typically has very few rules, while authoritarian parenting is thought of as a very strict, rule-driven type of parenting.”

Read the full essay: What Is Authoritative Parenting? at Healthline

Masked Education? The Benefits and Burdens of Wearing Face Masks in Schools During the Pandemic

Sample lines: “Face masks can prevent the spread of the virus SARS-CoV-2. … However, covering the lower half of the face reduces the ability to communicate. Positive emotions become less recognizable, and negative emotions are amplified. Emotional mimicry, contagion, and emotionality in general are reduced and (thereby) bonding between teachers and learners, group cohesion, and learning—of which emotions are a major driver. The benefits and burdens of face masks in schools should be seriously considered and made obvious and clear to teachers and students.”

Read the full essay: Masked Education? The Benefits and Burdens of Wearing Face Masks in Schools During the Pandemic at National Library of Medicine

To Ban or Not: What Should We Really Make of Book Bans?

Sample lines: “In recent years, book bans have soared in schools, reaching an all-time high in fall 2022. … The challenge of balancing parent concerns about ‘age appropriateness’ against the imperative of preparing students to be informed citizens is still on the minds of many educators today. … Such curricular decision-making  should  be left to the professionals, argues English/language arts instructional specialist Miriam Plotinsky. ‘Examining texts for their appropriateness is not a job that noneducators are trained to do,’ she wrote last year, as the national debate over censorship resurged with the news that a Tennessee district banned the graphic novel  Maus  just days before Holocaust Remembrance Day.”

Read the full essay: To Ban or Not: What Should We Really Make of Book Bans? at Education Week

Technology Compare and Contrast Essay Examples

Netflix vs. hulu 2023: which is the best streaming service.

Sample lines: “Netflix fans will point to its high-quality originals, including  The Witcher ,  Stranger Things ,  Emily in Paris ,  Ozark , and more, as well as a wide variety of documentaries like  Cheer ,  The Last Dance ,  My Octopus Teacher , and many others. It also boasts a much larger subscription base, with more than 222 million subscribers compared to Hulu’s 44 million. Hulu, on the other hand, offers a variety of extras such as HBO and Showtime—content that’s unavailable on Netflix. Its price tag is also cheaper than the competition, with its $7/mo. starting price, which is a bit more palatable than Netflix’s $10/mo. starting price.”

Read the full essay: Netflix vs. Hulu 2023: Which is the best streaming service? at TV Guide

Kindle vs. Hardcover: Which is easier on the eyes?

Sample lines: “In the past, we would have to drag around heavy books if we were really into reading. Now, we can have all of those books, and many more, stored in one handy little device that can easily be stuffed into a backpack, purse, etc. … Many of us still prefer to hold an actual book in our hands. … But, whether you use a Kindle or prefer hardcover books or paperbacks, the main thing is that you enjoy reading. A story in a book or on a Kindle device can open up new worlds, take you to fantasy worlds, educate you, entertain you, and so much more.”

Read the full essay: Kindle vs. Hardcover: Which is easier on the eyes? at Books in a Flash

iPhone vs. Android: Which is better for you?

Sample lines: “The iPhone vs. Android comparison is a never-ending debate on which one is best. It will likely never have a real winner, but we’re going to try and help you to find your personal pick all the same. iOS 17 and Android 14—the latest versions of the two operating systems—both offer smooth and user-friendly experiences, and several similar or identical features. But there are still important differences to be aware of. … Owning an iPhone is a simpler, more convenient experience. There’s less to think about. … Android-device ownership is a bit harder. … Yet it’s simultaneously more freeing, because it offers more choice.”

Read the full essay: iPhone vs. Android: Which is better for you? at Tom’s Guide

Cutting the cord: Is streaming or cable better for you?

Sample lines: “Cord-cutting has become a popular trend in recent years, thanks to the rise of streaming services. For those unfamiliar, cord cutting is the process of canceling your cable subscription and instead, relying on streaming platforms such as Netflix and Hulu to watch your favorite shows and movies. The primary difference is that you can select your streaming services à la carte while cable locks you in on a set number of channels through bundles. So, the big question is: should you cut the cord?”

Read the full essay: Cutting the cord: Is streaming or cable better for you? at BroadbandNow

PS5 vs. Nintendo Switch

Sample lines: “The crux of the comparison comes down to portability versus power. Being able to migrate fully fledged Nintendo games from a big screen to a portable device is a huge asset—and one that consumers have taken to, especially given the Nintendo Switch’s meteoric sales figures. … It is worth noting that many of the biggest franchises like Call of Duty, Madden, modern Resident Evil titles, newer Final Fantasy games, Grand Theft Auto, and open-world Ubisoft adventures like Assassin’s Creed will usually skip Nintendo Switch due to its lack of power. The inability to play these popular games practically guarantees that a consumer will pick up a modern system, while using the Switch as a secondary device.”

Read the full essay: PS5 vs. Nintendo Switch at Digital Trends

What is the difference between Facebook and Instagram?

Sample lines: “Have you ever wondered what is the difference between Facebook and Instagram? Instagram and Facebook are by far the most popular social media channels used by digital marketers. Not to mention that they’re also the biggest platforms used by internet users worldwide. So, today we’ll look into the differences and similarities between these two platforms to help you figure out which one is the best fit for your business.”

Read the full essay: What is the difference between Facebook and Instagram? at SocialBee

Digital vs. Analog Watches—What’s the Difference?

Sample lines: “In short, digital watches use an LCD or LED screen to display the time. Whereas, an analog watch features three hands to denote the hour, minutes, and seconds. With the advancement in watch technology and research, both analog and digital watches have received significant improvements over the years. Especially in terms of design, endurance, and accompanying features. … At the end of the day, whether you go analog or digital, it’s a personal preference to make based on your style, needs, functions, and budget.”

Read the full essay: Digital vs. Analog Watches—What’s the Difference? at Watch Ranker

AI Art vs. Human Art: A Side-by-Side Analysis

Sample lines: “Art has always been a reflection of human creativity, emotion, and cultural expression. However, with the rise of artificial intelligence (AI), a new form of artistic creation has emerged, blurring the lines between what is created by human hands and what is generated by algorithms. … Despite the excitement surrounding AI Art, it also raises complex ethical, legal, and artistic questions that have sparked debates about the definition of art, the role of the artist, and the future of art production. … Regardless of whether AI Art is considered ‘true’ art, it is crucial to embrace and explore the vast possibilities and potential it brings to the table. The transformative influence of AI art on the art world is still unfolding, and only time will reveal its true extent.”

Read the full essay: AI Art vs. Human Art: A Side-by-Side Analysis at Raul Lara

Pop Culture Compare and Contrast Essay Examples

Christina aguilera vs. britney spears.

Sample lines: “Britney Spears vs. Christina Aguilera was the Coke vs. Pepsi of 1999 — no, really, Christina repped Coke and Britney shilled for Pepsi. The two teen idols released debut albums seven months apart before the turn of the century, with Britney’s becoming a standard-bearer for bubblegum pop and Aguilera’s taking an R&B bent to show off her range. … It’s clear that Spears and Aguilera took extremely divergent paths following their simultaneous breakout successes.”

Read the full essay: Christina Aguilera vs. Britney Spears at The Ringer

Harry Styles vs. Ed Sheeran

Sample lines: “The world heard our fantasies and delivered us two titans simultaneously—we have been blessed with Ed Sheeran and Harry Styles. Our cup runneth over; our bounty is immeasurable. More remarkable still is the fact that both have released albums almost at the same time: Ed’s third, Divide , was released in March and broke the record for one-day Spotify streams, while Harry’s frenziedly anticipated debut solo, called Harry Styles , was released yesterday.”

Read the full essay: Harry Styles versus Ed Sheeran at Belfast Telegraph

The Grinch: Three Versions Compared

Sample lines: “Based on the original story of the same name, this movie takes a completely different direction by choosing to break away from the cartoony form that Seuss had established by filming the movie in a live-action form. Whoville is preparing for Christmas while the Grinch looks down upon their celebrations in disgust. Like the previous film, The Grinch hatches a plan to ruin Christmas for the Who’s. … Like in the original Grinch, he disguises himself as Santa Claus, and makes his dog, Max, into a reindeer. He then takes all of the presents from the children and households. … Cole’s favorite is the 2000 edition, while Alex has only seen the original. Tell us which one is your favorite.”

Read the full essay: The Grinch: Three Versions Compared at Wooster School

Historical and Political Compare and Contrast Essay Examples

Malcolm x vs. martin luther king jr.: comparison between two great leaders’ ideologies .

Sample lines: “Although they were fighting for civil rights at the same time, their ideology and way of fighting were completely distinctive. This can be for a plethora of reasons: background, upbringing, the system of thought, and vision. But keep in mind, they devoted their whole life to the same prospect. … Through boycotts and marches, [King] hoped to end racial segregation. He felt that the abolition of segregation would improve the likelihood of integration. Malcolm X, on the other hand, spearheaded a movement for black empowerment.”

Read the full essay: Malcolm X vs. Martin Luther King Jr.: Comparison Between Two Great Leaders’ Ideologies  at Melaninful

Contrast Between Obama and Trump Has Become Clear

Sample lines: “The contrast is even clearer when we look to the future. Trump promises more tax cuts, more military spending, more deficits and deeper cuts in programs for the vulnerable. He plans to nominate a coal lobbyist to head the Environmental Protection Agency. … Obama says America must move forward, and he praises progressive Democrats for advocating Medicare for all. … With Obama and then Trump, Americans have elected two diametrically opposed leaders leading into two very different directions.”

Read the full essay: Contrast Between Obama and Trump Has Become Clear at Chicago Sun-Times

Sports Compare and Contrast Essay Examples

Lebron james vs. kobe bryant: a complete comparison.

Sample lines: “LeBron James has achieved so much in his career that he is seen by many as the greatest of all time, or at least the only player worthy of being mentioned in the GOAT conversation next to Michael Jordan. Bridging the gap between Jordan and LeBron though was Kobe Bryant, who often gets left out of comparisons and GOAT conversations. … Should his name be mentioned more though? Can he compare to LeBron or is The King too far past The Black Mamba in historical rankings already?”

Read the full essay: LeBron James vs. Kobe Bryant: A Complete Comparison at Sportskeeda

NFL: Tom Brady vs. Peyton Manning Rivalry Comparison

Sample lines: “Tom Brady and Peyton Manning were largely considered the best quarterbacks in the NFL for the majority of the time they spent in the league together, with the icons having many head-to-head clashes in the regular season and on the AFC side of the NFL Playoffs. Manning was the leader of the Indianapolis Colts of the AFC South. … Brady spent his career as the QB of the AFC East’s New England Patriots, before taking his talents to Tampa Bay. … The reality is that winning is the most important aspect of any career, and Brady won more head-to-head matchups than Manning did.”

Read the full essay: NFL: Tom Brady vs. Peyton Manning Rivalry Comparison at Sportskeeda

The Greatest NBA Franchise Ever: Boston Celtics or Los Angeles Lakers?

Sample lines: “The Celtics are universally considered as the greatest franchise in NBA history. But if you take a close look at the numbers, there isn’t really too much separation between them and their arch-rival Los Angeles Lakers. In fact, you can even make a good argument for the Lakers. … In 72 seasons played, the Boston Celtics have won a total of 3,314 games and lost 2,305 or a .590 winning mark. On the other hand, the Los Angeles Lakers have won 3,284 of 5,507 total games played or a slightly better winning record of .596. … But while the Lakers have the better winning percentage, the Celtics have the advantage over them in head-to-head competition.”

Read the full essay: The Greatest NBA Franchise Ever: Boston Celtics or Los Angeles Lakers? at Sport One

Is Soccer Better Than Football?

Sample lines: “Is soccer better than football? Soccer and football lovers have numerous reasons to support their sport of choice. Both keep the players physically fit and help to bring people together for an exciting cause. However, soccer has drawn more numbers globally due to its popularity in more countries.”

Read the full essay: Is Soccer Better Than Football? at Sports Brief

Lifestyle Choices Compare and Contrast Essay Examples

Mobile home vs. tiny house: similarities, differences, pros & cons.

Sample lines: “Choosing the tiny home lifestyle enables you to spend more time with those you love. The small living space ensures quality bonding time rather than hiding away in a room or behind a computer screen. … You’ll be able to connect closer to nature and find yourself able to travel the country at any given moment. On the other hand, we have the mobile home. … They are built on a chassis with transportation in mind. … They are not built to be moved on a constant basis. … While moving the home again *is* possible, it may cost you several thousand dollars.”

Read the full essay: Mobile Home vs. Tiny House: Similarities, Differences, Pros & Cons at US Mobile Home Pros

Whole Foods vs. Walmart: The Story of Two Grocery Stores

Sample lines: “It is clear that both stores have very different stories and aims when it comes to their customers. Whole Foods looks to provide organic, healthy, exotic, and niche products for an audience with a very particular taste. … Walmart, on the other hand, looks to provide the best deals, every possible product, and every big brand for a broader audience. … Moreover, they look to make buying affordable and accessible, and focus on the capitalist nature of buying.”

Read the full essay: Whole Foods vs. Walmart: The Story of Two Grocery Stores at The Archaeology of Us

Artificial Grass vs. Turf: The Real Differences Revealed

Sample lines: “The key difference between artificial grass and turf is their intended use. Artificial turf is largely intended to be used for sports, so it is shorter and tougher. On the other hand, artificial grass is generally longer, softer and more suited to landscaping purposes. Most homeowners would opt for artificial grass as a replacement for a lawn, for example. Some people actually prefer playing sports on artificial grass, too … artificial grass is often softer and more bouncy, giving it a feel similar to playing on a grassy lawn. … At the end of the day, which one you will choose will depend on your specific household and needs.”

Read the full essay: Artificial Grass vs. Turf: The Real Differences Revealed at Almost Grass

Minimalism vs. Maximalism: Differences, Similarities, and Use Cases

Sample lines: “Maximalists love shopping, especially finding unique pieces. They see it as a hobby—even a skill—and a way to express their personality. Minimalists don’t like shopping and see it as a waste of time and money. They’d instead use those resources to create memorable experiences. Maximalists desire one-of-a-kind possessions. Minimalists are happy with duplicates—for example, personal uniforms. … Minimalism and maximalism are about being intentional with your life and belongings. It’s about making choices based on what’s important to you.”

Read the full essay: Minimalism vs. Maximalism: Differences, Similarities, and Use Cases at Minimalist Vegan

Vegetarian vs. Meat Eating: Is It Better To Be a Vegetarian?

Sample lines: “You’ve heard buzz over the years that following a vegetarian diet is better for your health, and you’ve probably read a few magazine articles featuring a celeb or two who swore off meat and animal products and ‘magically’ lost weight. So does ditching meat automatically equal weight loss? Will it really help you live longer and be healthier overall? … Vegetarians appear to have lower low-density lipoprotein cholesterol levels, lower blood pressure  and lower rates of hypertension and type 2 diabetes than meat eaters. Vegetarians also tend to have a lower body mass index, lower overall cancer rates and lower risk of chronic disease. But if your vegetarian co-worker is noshing greasy veggie burgers and fries every day for lunch, is he likely to be healthier than you, who always orders the grilled salmon? Definitely not!”

Read the full essay: Vegetarian vs. Meat Eating: Is It Better To Be a Vegetarian? at WebMD

Healthcare Compare and Contrast Essay Examples

Similarities and differences between the health systems in australia & usa.

Sample lines: “Australia and the United States are two very different countries. They are far away from each other, have contrasting fauna and flora, differ immensely by population, and have vastly different healthcare systems. The United States has a population of 331 million people, compared to Australia’s population of 25.5 million people.”

Read the full essay: Similarities and Differences Between the Health Systems in Australia & USA at Georgia State University

Universal Healthcare in the United States of America: A Healthy Debate

Sample lines: “Disadvantages of universal healthcare include significant upfront costs and logistical challenges. On the other hand, universal healthcare may lead to a healthier populace, and thus, in the long-term, help to mitigate the economic costs of an unhealthy nation. In particular, substantial health disparities exist in the United States, with low socio-economic status segments of the population subject to decreased access to quality healthcare and increased risk of non-communicable chronic conditions such as obesity and type II diabetes, among other determinants of poor health.”

Read the full essay: Universal Healthcare in the United States of America: A Healthy Debate at National Library of Medicine

Pros and Cons of Physician Aid in Dying

Sample lines: “Physician aid in dying is a controversial subject raising issues central to the role of physicians. … The two most common arguments in favor of legalizing AID are respect for patient autonomy and relief of suffering. A third, related, argument is that AID is a safe medical practice, requiring a health care professional. … Although opponents of AID offer many arguments ranging from pragmatic to philosophical, we focus here on concerns that the expansion of AID might cause additional, unintended harm through suicide contagion, slippery slope, and the deaths of patients suffering from depression.”

Read the full essay: Pros and Cons of Physician Aid in Dying at National Library of Medicine

Animals Compare and Contrast Essay Examples

Compare and contrast paragraph—dogs and cats.

Sample lines: “Researchers have found that dogs have about twice the number of neurons in their cerebral cortexes than what cats have. Specifically, dogs had around 530 million neurons, whereas the domestic cat only had 250 million neurons. Moreover, dogs can be trained to learn and respond to our commands, but although your cat understands your name, and anticipates your every move, he/she may choose to ignore you.”

Read the full essay: Compare and Contrast Paragraph—Dogs and Cats at Proofwriting Guru via YouTube

Giddyup! The Differences Between Horses and Dogs

Sample lines: “Horses are prey animals with a deep herding instinct. They are highly sensitive to their environment, hyper aware, and ready to take flight if needed. Just like dogs, some horses are more confident than others, but just like dogs, all need a confident handler to teach them what to do. Some horses are highly reactive and can be spooked by the smallest things, as are dogs. … Another distinction between horses and dogs … was that while dogs have been domesticated , horses have been  tamed. … Both species have influenced our culture more than any other species on the planet.”

Read the full essay: Giddyup! The Differences Between Horses and Dogs at Positively Victoria Stilwell

Exotic, Domesticated, and Wild Pets

Sample lines: “Although the words ‘exotic’ and ‘wild’ are frequently used interchangeably, many people do not fully understand how these categories differ when it comes to pets. ‘A wild animal is an indigenous, non-domesticated animal, meaning that it is native to the country where you are located,’ Blue-McLendon explained. ‘For Texans, white-tailed deer, pronghorn sheep, raccoons, skunks, and bighorn sheep are wild animals … an exotic animal is one that is wild but is from a different continent than where you live.’ For example, a hedgehog in Texas would be considered an exotic animal, but in the hedgehog’s native country, it would be considered wildlife.”

Read the full essay: Exotic, Domesticated, and Wild Pets at Texas A&M University

Should Zoos Be Banned? Pros & Cons of Zoos

Sample lines: “The pros and cons of zoos often come from two very different points of view. From a legal standard, animals are often treated as property. That means they have less rights than humans, so a zoo seems like a positive place to maintain a high quality of life. For others, the forced enclosure of any animal feels like an unethical decision. … Zoos provide a protected environment for endangered animals, and also help in raising awareness and funding for wildlife initiatives and research projects. … Zoos are key for research. Being able to observe and study animals is crucial if we want to contribute to help them and repair the ecosystems. … Zoos are a typical form of family entertainment, but associating leisure and fun with the contemplation of animals in captivity can send the wrong signals to our children.”

Read the full essay: Should Zoos Be Banned? Pros & Cons of Zoos at EcoCation

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