Category Archives: set theory

Don’t conflate fuzzy set membership with cases in QCA

How to properly interpret consistency and coverage values in fuzzy-set QCA. Continue reading

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Curiosities of QCA: Fuzzy-set consistency

Qualitative Comparative Analysis (QCA) is the method of choice for the analysis of set relations and has changed considerably and improved over the years. The more one delves into the method, however, the more things you (I, at least) stumble … Continue reading

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You are a regularity theorist when using the Coincidence Analysis algorithm in QCA

One of the recent big and, in my view, underappreciated innovations in the field of Qualitative Comparative Analysis (QCA) is Baumgartner’s formulation of the Coincidence Analysis algorithm (CNA). Baumgartner presents it as an alternative to QCA, which I do not … Continue reading

Posted in algorithm, causal inference, causation, CNA, QCA, qualitative, Qualitative Comparative Analysis, Quine-McCluskey, regularity, set relation, set theory | Tagged , , , , , , | 2 Comments

Another mistaken criticism of set theory and set-theoretic methods

For some time now, a discussion has been raging about the pros and cons of set theory and the use of set-theoretic methods (STM) in the social sciences (e.g., in Sociological Methodology and the APSA Newsletter). Following up on a … Continue reading

Posted in causal inference, causal mechanism, causation, comparative, process tracing, QCA, qualitative, Qualitative Comparative Analysis, set relation, set theory | Tagged , , , , , , , | Leave a comment

Reproducible QCA studies with fs/QCA

How to enhance reproducibility when using fs/QCA software Continue reading

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Surprised, anyone? Putting the debate about QCA into context

As is well known, QCA has been under intense scrutiny in recent years and subject to criticism (sometimes quite strong). I am not going to review studies on the validity of QCA that entail criticism; although it would be worthwhile … Continue reading

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The conservative QCA solution isn’t based on counterfactuals? Not so fast

When we use the Quine-McCluskey algorithm to derive a QCA solution, we can choose between the conservative, intermediate or parsimonious solution. While I do not have any figures about which solution has been produced how frequently in empirical research, it … Continue reading

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