Majoritarian aggregation and Nash implementation of experts' opinions

Pablo Amoros

No 2018-05, Working Papers from Universidad de Málaga, Department of Economic Theory, Málaga Economic Theory Research Center

Abstract: A group of experts must choose the winner of a competition. The honest opinions of the experts must be aggregated to determine the deserving winner. The aggregation rule is majoritarian if it respects the honest opinion of the majority of experts. An expert might not want to reveal her honest opinion if, by doing so, a contestant that she likes more is chosen. Then, we have to design a mechanism that implements the aggregation rule. We show that, in general, no majoritarian aggregation rule is Nash implementable, even if no expert has friends or enemies among the contestants.

Keywords: mechanism design; Nash equilibrium; aggregation of experts' opinions; jury (search for similar items in EconPapers)
JEL-codes: C72 D71 D78 (search for similar items in EconPapers)
Pages: 9 pages
Date: 2018-07
New Economics Papers: this item is included in nep-des, nep-gth and nep-mic
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Persistent link: https://EconPapers.repec.org/RePEc:mal:wpaper:2018-5

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