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Partially efficient voting by committees

Author

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  • Ken-Ichi Shimomura

    (Institute of Economic Research, Kyoto University, Sakyo-Ku, Kyoto 606, Japan)

Abstract

On the separable preference domain, voting by committees is the only class of voting rules that satisfy strategy-proofness and unanimity, and dictatorial rules are the only ones that are strategy-proof and Pareto efficient. To fill the gap, we define a sequence of efficiency conditions. We prove that for strategy-proof rules on the separable preference domain, the various notions of efficiency reduce to three: unanimity, partial efficiency, and Pareto efficiency. We also show that on the domain, strategy-proofness and partial efficiency characterize the class of voting rules represented as simple games which are independent of objects, proper and strong. We call such rules voting by stable committee.

Suggested Citation

  • Ken-Ichi Shimomura, 1996. "Partially efficient voting by committees," Social Choice and Welfare, Springer;The Society for Social Choice and Welfare, vol. 13(3), pages 327-342.
    • Handle: RePEc:spr:sochwe:v:13:y:1996:i:3:p:327-342
    Note: Received: 24 December 1993/Accepted: 20 January 1995
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    Cited by:

    1. Biung-Ghi Ju, 2005. "A characterization of plurality-like rules based on non-manipulability, restricted efficiency, and anonymity," International Journal of Game Theory, Springer;Game Theory Society, vol. 33(3), pages 335-354, September.
    2. Kentaro Hatsumi & Dolors Berga & Shigehiro Serizawa, 2014. "A maximal domain for strategy-proof and no-vetoer rules in the multi-object choice model," International Journal of Game Theory, Springer;Game Theory Society, vol. 43(1), pages 153-168, February.
    3. Nehring, Klaus & Puppe, Clemens, 2007. "Efficient and strategy-proof voting rules: A characterization," Games and Economic Behavior, Elsevier, vol. 59(1), pages 132-153, April.

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