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A Pooling Approach to Judgment Aggregation

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  • García-Bermejo, Juan Carlos

    ()
    (Departamento de Análisis Económico (Teoría e Historia Económica). Universidad Autónoma de Madrid.)

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    Abstract

    The literature has focused on a particular way of aggregating judgments: Given a set of yes or no questions or issues, the individuals’ judgments are then aggregated separately, issue by issue. Applied in this way, the majority method does not guarantee the logical consistency of the set of judgments obtained. This fact has been the focus of critiques of the majority method and similar procedures. This paper focuses on another way of aggregating judgments. The main difference is that aggregation is made en bloc on all the issues at stake. The main consequence is that the majority method applied in this way does always guarantee the logical consistency of the collective judgments. Since it satisfies a large set of attractive properties, it should provide the basis for more positive assessment if applied using the proposed pooling approach than if used separately. The paper extends the analysis to the pooling supermajority and plurality rules, with similar results.

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    Bibliographic Info

    Paper provided by Universidad Autónoma de Madrid (Spain), Department of Economic Analysis (Economic Theory and Economic History) in its series Working Papers in Economic Theory with number 2012/01.

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    Length: 29 pages
    Date of creation: Jan 2012
    Date of revision:
    Handle: RePEc:uam:wpaper:201201

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    Keywords: judgment aggregation; pooling-; separating approach; majority-; special majority-; plurality voting.;

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    1. Dietrich, Franz & List, Christian, 2007. "Judgment aggregation without full rationality," Research Memorandum, Maastricht University, Maastricht Research School of Economics of Technology and Organization (METEOR) 023, Maastricht University, Maastricht Research School of Economics of Technology and Organization (METEOR).
    2. Dietrich, Franz & List, Christian, 2010. "Majority voting on restricted domains," Journal of Economic Theory, Elsevier, Elsevier, vol. 145(2), pages 512-543, March.
    3. Franz Dietrich & Christian List, 2010. "The impossibility of unbiased judgment aggregation," Theory and Decision, Springer, Springer, vol. 68(3), pages 281-299, March.
    4. Franz Dietrich & Christian List, 2005. "Strategy-proof judgment aggregation," STICERD - Political Economy and Public Policy Paper Series, Suntory and Toyota International Centres for Economics and Related Disciplines, LSE 09, Suntory and Toyota International Centres for Economics and Related Disciplines, LSE.
    5. Franz Dietrich & Christian List, 2005. "Judgment aggregation by quota rules," Public Economics, EconWPA 0501005, EconWPA.
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