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Evaluationwise strategy-proofness

Bora Erdamar, Remzi Sanver () and Shin Sato

Games and Economic Behavior, 2017, vol. 106, issue C, 227-238

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.

Keywords: Approval voting; Efficiency; Evaluationwise strategy-proofness; Preference-approval; Strategy-proofness (search for similar items in EconPapers)
JEL-codes: D71 D82 (search for similar items in EconPapers)
Date: 2017
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