报告题目：Lying and Lie-detection说谎与测谎

报告人：谭彦之（bat365官网登录）

报告时间：2021年4月1日（星期四）上午8:30-9:30

报告地点：bat365中文官方网站大楼218会议室

 

报告人简介：

谭彦之 博士，bat365官网登录奥利弗·哈特合同与治理研究中心博士后，2020年获不列颠哥伦比亚大学经济学博士学位，主要研究应用微观经济理论、机制设计、行为经济学。

 

报告摘要：

This paper analyzes strategic interactions between lying and lie-detection, and studies the optimal design for costly lie-detection and its effectiveness. An informed sender wants to persuade an uninformed receiver to take high actions but the receiver wants to match the action with the true state. The sender makes a claim about the true state and the receiver decides whether to incur a cost to inspect the truthfulness of the claim. I show that lie-detection technology is useful in improving the receiver’s welfare if and only if the cost of lie-detection is sufficiently low and prior expectation of the state is not too high. The receiver-optimal design of admissible claims leads to an equilibrium with three intervals in the state space, where types in the top interval are induced to make precise and truthful claims about the state, which are mimicked by types in the bottom interval and randomly inspected, while types in the middle interval make a truthful but vague claim that is never inspected. Compared to state verification, lie-detection is shown to be more beneficial to the receiver because it provides incentives for moderate and high types to be truthful. This suggests that fact-checking of politicians’ claims is effective in holding them countable and deterring them from lying.

 

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