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Pareto Efficiency And Weighted Majority Rules

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  • Yaron Azrieli
  • Semin Kim

Abstract

We consider the design of decision rules in an environment with two alternatives, independent private values and no monetary transfers. The utilitarian rule subject to incentive compatibility constraints is a weighted majority rule, where agents' weights correspond to expected gains given that their favorite alternative is chosen. It is shown that a rule is interim incentive efficient if and only if it is a weighted majority rule, and we characterize those weighted majority rules that are ex ante incentive efficient. We also discuss efficiency in the class of anonymous mechanisms and the stability of weighted majority rules.

Suggested Citation

  • Yaron Azrieli & Semin Kim, 2014. "Pareto Efficiency And Weighted Majority Rules," International Economic Review, Department of Economics, University of Pennsylvania and Osaka University Institute of Social and Economic Research Association, vol. 55(4), pages 1067-1088, November.
    • Handle: RePEc:wly:iecrev:v:55:y:2014:i:4:p:1067-1088
    DOI: 10.1111/iere.12083
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    Cited by:

    1. Gersbach, Hans & Tejada, Oriol, 2020. "Semi-flexible Majority Rules for Public Good Provision," CEPR Discussion Papers 15099, C.E.P.R. Discussion Papers.
    2. Johann Caro‐Burnett, 2022. "Optimal voting rules for international organizations, with an application to the United Nations," Journal of Public Economic Theory, Association for Public Economic Theory, vol. 24(6), pages 1463-1501, December.
    3. Miho Hong & Semin Kim, 2018. "Unanimity and Local Incentive Compatibility," Working papers 2018rwp-138, Yonsei University, Yonsei Economics Research Institute.
    4. Kikuchi, Kazuya & Koriyama, Yukio, 2023. "The winner-take-all dilemma," Theoretical Economics, Econometric Society, vol. 18(3), July.

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