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| Qualitative Comparative Analysis× | Most Similar Systems Design× | |
|---|---|---|
| Πεδίο | Political Science | Political Science |
| Οικογένεια | Process / pipeline | Process / pipeline |
| Έτος προέλευσης≠ | 1987 | 1970 |
| Δημιουργός≠ | Charles C. Ragin | John Stuart Mill (method of difference); Przeworski & Teune (systems framing) |
| Τύπος≠ | Set-theoretic, configurational comparative method | Small-N comparative case-selection design |
| Θεμελιώδης πηγή≠ | Ragin, C. C. (1987). The Comparative Method: Moving Beyond Qualitative and Quantitative Strategies. Berkeley: University of California Press. ISBN: 9780520058347 | Przeworski, A., & Teune, H. (1970). The Logic of Comparative Social Inquiry. New York: Wiley-Interscience. ISBN: 9780471701422 |
| Εναλλακτικές ονομασίες | QCA, csQCA, fsQCA, Configurational comparative method | MSSD, Most similar cases design, Mill's method of difference, Comparable cases strategy |
| Συναφείς | 3 | 3 |
| Σύνοψη≠ | Qualitative Comparative Analysis (QCA) is a set-theoretic, configurational method that identifies which combinations of conditions are necessary or sufficient for an outcome across a set of cases. Developed by Charles Ragin, it treats each case as a configuration of set memberships, builds a truth table of all logically possible combinations, and uses Boolean algebra to minimize them into the simplest expressions that account for the outcome. It bridges qualitative case knowledge and cross-case generalization, embracing causal complexity through conjunctural causation, equifinality, and asymmetry. | The most similar systems design (MSSD) is a small-N comparative strategy that selects cases as alike as possible on many background characteristics but differing on the outcome of interest. By matching cases so that most potential confounders are held roughly constant, the design isolates the few factors that vary alongside the outcome as the candidate causes. Rooted in John Stuart Mill's method of difference and named by Przeworski and Teune, it is a cornerstone of comparative politics for drawing causal inferences from a handful of countries or cases. |
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