Strategy Proof Choice of Acts: Beyond Dictatorship

Department of Economics    2017-06-26

Strategyproof Choice of Acts: Beyond Dictatorship

Speaker: Yves Sprumont,  Professor of Economics, University of Montreal

Host: Zhang Guoxiong, Assistant Professor from Department of Economics, ACEM

Time: Jun 29, Thursday, 10:00-11:30

Venue: B1116 Antai College Building


We model uncertain social prospects as acts mapping states of nature to (public) outcomes. A social choice function (or SCF) assigns an act to every profile of subjective expected utility preferences over acts. A SCF is strategyproof if no agent ever has an incentive to misrepresent her beliefs about the states of nature or her valuation of the outcomes; it is ex-post efficient if the act selected at any given preference profile picks a Pareto-efficient outcome in every state of nature. We offer a complete characterisation of all strategyproof and ex-post efficient SCFs. The chosen act must pick the most preferred outcome of some (possibly different) agent in every state of nature. The set of states in which an agent's top outcome is selected may vary with the reported belief profile; it is the union of all the states assigned to her by a collection of bilaterally dictatorial and bilaterally consensual assignment rules.

Speaker Introduction: 

Professor Sprumont is a Professor of Economics (since 2002) at University of Montreal in Canada and a Research Fellow at CIREQ. His research area is microeconomic theory. He is a recipient of the 2015 Marcel Dagenais Prize as well as  the 2012 John Rae Prize. He is a Fellow of the Society for the Advancement of Economic Theory (since 2011) and a Charter Member of the Game Theory Society. He has also been a Council Member of the Society for Social Choice and Welfare (2000-2004 and 2010-2014). He is an associate editor of Theoretical Economics (since 2016) and Journal of Economic Theory (since 2013). He has also served on the editorial board of several other academic journals such as Games and Economic Behavior. His research has been published on top academic journals such as Econometrica, Theoratical Economics, Journal of Economic Theory, and Games and Economic Behavior.

Welcome to attend!