讲座：Strategyproof Choice of Acts: Beyond Dictatorship
题 目： Strategyproof Choice of Acts: Beyond Dictatorship
演讲人： Yves Sprumont, Professor of Economics, University of Montreal
主持人： 张国雄 博士 上海交通大学安泰经济与管理学院经济系
时 间：2017年6月29日 (周四) 10:00-11:30
地 点：上海交通大学 徐汇校区安泰经济与管理学院B1116室
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 characterization 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.
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.