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Evaluationwise strategy-proofness

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  • Erdamar, Bora
  • Sanver, M. Remzi
  • Sato, Shin

Abstract

We consider manipulation of collective decision making rules in a framework where voters not only rank candidates but also evaluate them as “acceptable” or “unacceptable”. In this richer informational setting, we adopt a new notion of strategy-proofness, called evaluationwise strategy-proofness, where incentives of manipulation exist if and only if a voter can replace an outcome which he finds unacceptable with an acceptable one. Evaluationwise strategy-proofness is weaker than strategy-proofness. However, we establish the prevalence of a logical incompatibility between evaluationwise strategy-proofness, anonymity and efficiency. On the other hand, we show possibility results when either anonymity or efficiency is weakened.

Suggested Citation

  • Erdamar, Bora & Sanver, M. Remzi & Sato, Shin, 2017. "Evaluationwise strategy-proofness," Games and Economic Behavior, Elsevier, vol. 106(C), pages 227-238.
    • Handle: RePEc:eee:gamebe:v:106:y:2017:i:c:p:227-238
    DOI: 10.1016/j.geb.2017.10.010
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    More about this item

    Keywords

    Approval voting; Efficiency; Evaluationwise strategy-proofness; Preference-approval; Strategy-proofness;
    All these keywords.

    JEL classification:

    • D71 - Microeconomics - - Analysis of Collective Decision-Making - - - Social Choice; Clubs; Committees; Associations
    • D82 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Asymmetric and Private Information; Mechanism Design

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