%0 Generic
%A Rodríguez Álvarez, Carmelo
%T Strategy-proof social choice correspondences for conditional expected utility maximizers
%J Documentos de trabajo del Instituto Complutense de Análisis Económico
%D 2025
%@ 2341-2356
%U https://hdl.handle.net/20.500.14352/126067
%X 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, strategy-proofness also permits rules that select the set of best elements determined by two fixed voters.
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