时间：4月16日（周四）10:30 a.m.-12:00

地点：北京大学经济学院305

主持老师：吴泽南，石凡奇（经院）；胡岠（国发院）

参与老师：胡涛，吴泽南，石凡奇（经院）；汪浩，胡岠，邢亦青（国发院）；翁翕，刘烁（光华）

主讲人：Chew Soo Hong（Director and Chief Professor of the Center for Intelligence Economic Science at Southwestern University of Finance and Economics）

题目: Confidential Implementation

摘要：

Collective decision making to attain social objectives relies on aggregating individuals’

private information. Motivated by increasingly pervasive privacy concerns, we study

confidentiality of the implementation of a collective decision making rule beyond the well-discussed notion of anonymity. We introduce two privacy criteria. Intrusiveness refers to privacy loss arising from the administrator's undue collection of private information beyond what is necessary for determining social outcomes. Building on intrusiveness, exposedness concerns another form of privacy loss: undue disclosure of certain agents' private information to other agents unnecessary for conditional information revelation. An implementation is confidential if it is least intrusive and least exposing.

We characterize confidential implementation using a class of dynamic mechanisms, called gradual mechanism, that makes the flow of information explicit and provides an analogue of the revelation principle. We offer two transformations on gradual mechanisms to enhance confidentiality. One reduces intrusiveness by merging duplicate actions. The other reduces exposedness by obfuscating superfluous information. An implementation is confidential if and only if no derived gradual mechanism admits either transformation. Applications include auction, matching, and voting

主讲人介绍：

Chew Soo Hong (周恕弘) is a world-renowned economist best known for his foundational contributions to decision theory and axiomatic non-expected utility models, beginning with his first publication in Econometrica and followed by a distinguished body of work that established him as a leading theorist and behavioral and experimental economist in the study of choice under risk and uncertainty; he currently serves as Director and Chief Professor of the Center for Intelligence Economic Science at Southwestern University of Finance and Economics; he is a Fellow of both the Econometric Society and the Society for the Advancement of Economic Theory, has received major honors including the Leonard J. Savage Award and the Decision Sciences Institute's Best Research Paper Award, and in 2022 was awarded the Sichuan Provincial Government's Tianfu Friendship Award for outstanding international cooperation, with recent research expanding into intelligence economics, neuroeconomics, and genetic and biological foundations of economic behavior through large-scale behavioral laboratory and interdisciplinary experimental studies.