Robust incentive compatibility of voting rules with positively correlated beliefs

Dipjyoti Majumdar () and Arunava Sen
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Dipjyoti Majumdar: Concordia University
Arunava Sen: Indian Statistical Institute

Social Choice and Welfare, 2021, vol. 57, issue 1, No 4, 63-95

Abstract: Abstract We investigate a voting model where each voter’s beliefs are positively correlated. We show that requiring a social choice function to be Ordinally Bayesian Incentive-Compatible (d’Aspremont and Peleg in Soc Choice Welf 5:261–280, 1988) with respect to all such beliefs is not equivalent to requiring it to be strategy-proof. However, if the social choice function is also required to be efficient, it must be strategy-proof and hence, dictatorial.

Date: 2021
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DOI: 10.1007/s00355-020-01304-9

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