时间：2026年5月14日13:30—15:00

地点：求索楼719

主讲人：Chew Soo Hong, 西南财经大学教授

主持人：孙一飞，u8国际

题目：Confidential Implementation: Ask (Tell) Only What is Necessary

Abstract: Collective decision making to attain social objectives relies on aggregating individuals'private information. Motivated by increasingly pervasive privacy concerns, we studyconfidentiality of the implementation of a collective decision making rule beyond the well-discussed notion of anonymity. We introduce two privacy criteria. Intrusiveness refers toprivacy loss arising from the administrator's undue collection of private information beyondwhat is necessary for determining social outcomes. Building on intrusiveness, exposednessconcerns another form of privacy loss: undue disclosure of certain agents' privateinformation to other agents unnecessary for conditional information revelation. Animplementation 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 enhances discreetness 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.

主讲人简介：

Chew Soo Hong周恕弘(新加坡国立大学、西南财经大学) 周恕弘教授是新加坡国立大学的荣休教授、西南财经大学中国行为经济与行为金融研究中心特聘主任，计量经济学会院士、经济学理论促进学会(SAET)院士(Fellow)，世界著名的实验经济学家和行为经济学家，曾执教于美国亚利桑那大学、约翰·霍普金斯大学、加州大学尔湾分校、香港科技大学。其在经济学以及其他学科顶级权威期刊比如 Econometrica，Journal of Political Economy,Review of Economic Studies, Journal of Economic Theory,Neuron,Proceedings of the National Academy of Sciences,Management Science等共发表过学术论文六十余篇。