Laurent Bouton , Georgetown University, Université Libre de Bruxelles, CEPR and NBER Micael Castanheira , Université Libre de Bruxelles, FNRS and CEPR Aniol Llorente-Saguer , Queen Mary University of London
December 20, 2015
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We propose a theory-based experimental approach to compare the properties of approval voting (AV) with those of plurality. This comparison is motivated by the theoretical predictions that, in our aggregate uncertainty setup, AV should produce close to first-best outcomes, while plurality will not. The experiment shows, first, that welfare gains are substantial. Second, both aggregate and individual responses are in line with theoretical predictions, and thus with strategic voting. Finally, subjects' behaviour under AV highlights the need to study equilibria in asymmetric strategies.
J.E.L classification codes: C72, C92, D70
Keywords:Multicandidate elections, Information aggregation, Plurality, Approval Voting, Laboratory experiments