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Three-Valued Modal Logic for Qualitative Comparative Policy Analysis with Crisp-Set QCA

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  • Mueller, Georg P.

Abstract

Contradictory and missing outcomes are problems common to many qualitative comparative studies, based on the methodology of crisp-set QCA. They also occur in public policy analyses, e.g. if important background variables are omitted or outcomes of new policies are technically censored. As a new solution to these problems, this article proposes the use of three-valued modal logic, originally introduced by the Polish philosopher Jan Lukasiewicz (1970). In addition to true and false, indeterminate is the third truth-value in this alternative approach, which serves to code missing or contradictory data. Moreover, modal operators allow a differentiation between strict and possible triggers and inhibitors of policy outcomes. The advantages of three-valued modal logic in crisp-set QCA are illustrated by an empirical example from comparative welfare policy analysis. Its conclusions allow comparisons with the corresponding results from a conventional crisp-set QCA of the same data-set.

Suggested Citation

  • Mueller, Georg P., 2014. "Three-Valued Modal Logic for Qualitative Comparative Policy Analysis with Crisp-Set QCA," FSES Working Papers 450, Faculty of Economics and Social Sciences, University of Freiburg/Fribourg Switzerland.
    • Handle: RePEc:fri:fribow:fribow00450
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    Cited by:

    1. Georg P. Mueller, 2019. "Three-valued modal logic for theory construction with contradictory data," Quality & Quantity: International Journal of Methodology, Springer, vol. 53(2), pages 775-789, March.

    More about this item

    Keywords

    Three-valued modal logic; qualitative comparative analysis (QCA); public policy; social security; international comparisons;
    All these keywords.

    JEL classification:

    • C65 - Mathematical and Quantitative Methods - - Mathematical Methods; Programming Models; Mathematical and Simulation Modeling - - - Miscellaneous Mathematical Tools
    • H43 - Public Economics - - Publicly Provided Goods - - - Project Evaluation; Social Discount Rate
    • H55 - Public Economics - - National Government Expenditures and Related Policies - - - Social Security and Public Pensions
    • Z18 - Other Special Topics - - Cultural Economics - - - Public Policy

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