Aggregating experts' opinions to select the winner of a competition

Pablo Amoros

No 2018-03, Working Papers from Universidad de Málaga, Department of Economic Theory, Málaga Economic Theory Research Center

Abstract: The honest opinions of a group of experts must be aggregated to determine the deserving winner of a competition. The aggregation procedure is majoritarian if, whenever a majority of experts honestly believe that a contestant is the best one, then that contestant is considered the deserving winner. The fact that an expert believes that a contestant is the best one does not necessarily imply that she wants this contestant to win as, for example, she might be biased in favor of some other contestant. Then, we have to design a mechanism that implements the deserving winner. We show that, if the aggregation procedure is majoritarian, such a mechanism exists only if the experts are totally impartial. This impossibility result is very strong as it does not depend on the equilibrium concept considered.

Keywords: mechanism design; social choice; aggregation of experts' opinions; jury (search for similar items in EconPapers)
JEL-codes: C72 D71 D78 (search for similar items in EconPapers)
Pages: 19 pages
Date: 2018-06
New Economics Papers: this item is included in nep-des, nep-gth and nep-mic
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https://theeconomics.uma.es/malagawpseries/Papers/METCwp2018-3.pdf First version, 2018 (application/pdf)

Related works:
Journal Article: Aggregating experts’ opinions to select the winner of a competition (2020)
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Persistent link: https://EconPapers.repec.org/RePEc:mal:wpaper:2018-3

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