Strategy-Proof Social Choice Correspondences for Conditional Expected Utility Maximizers

Carmelo Rodríguez à Lvarez ()
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Carmelo Rodríguez à Lvarez: Instituto Complutense de Análisis Económico (ICAE), Universidad Complutense de Madrid (Spain)
Authors registered in the RePEc Author Service: Carmelo Rodriguez-Alvarez ()

No 2025-07, Documentos de Trabajo del ICAE from Universidad Complutense de Madrid, Facultad de Ciencias Económicas y Empresariales, Instituto Complutense de Análisis Económico

Abstract: We analyze strategy-proof rules that select sets of alternatives based on voters’ preferences over those sets. Sets of alternatives represent social choices pending a final resolution and voters are expected utility maximizers that assign probabilities to alternatives within each set using Bayesian updating from a common prior probability assessment. If there are at least three alternatives, then, for generic priors, only dictatorial rules are strategy-proof and unanimous. However, when the prior probability assessment assigns equal probability to all alternatives, strategyproofness also permits rules that select the set of best elements determined by two fixed voters.

Keywords: Strategy-Proofness; Social Choice Functions over Sets; Cardinal Decision Schemes. (search for similar items in EconPapers)
JEL-codes: D71 D82 (search for similar items in EconPapers)
Pages: 19 pages
Date: 2025
New Economics Papers: this item is included in nep-dcm, nep-des, nep-mic and nep-upt
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https://hdl.handle.net/20.500.14352/126067

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