经济学院2023年数字经济系列讲座(九)
讲座题目:Distributional robust auction design
主讲嘉宾:杨湘黔 助理教授(湖南大学 助理教授)
讲座时间:2023年6月01日(周四)上午10:00--12:00
讲座地点:华中科技大学经济学院402室
内容提要:A single unit of a good is sold to one of a group risk-neutral bidders whose privately-known values are drawn independently from an identical distribution. The seller only has limited information about the value distribution and believes that the value distribution is designed by Nature adversarially to minimize revenue. In addition, the seller knows that bidders play undominated strategies. For the two-bidder case, we construct a strong maxmin solution, consisting of a mechanism, a value distribution, and an equilibrium in undominated strategies, such that neither the seller nor Nature can move revenue in their respective preferred directions, even if the deviator can select the new equilibrium in undominated strategies. The mechanism and value distribution solve a family of maxmin mechanism design and minmax information design problems, regardless of how an equilibrium in undominated strategies is selected. The maxmin mechanism is a second-price auction with a random reserve price. For arbitrary number of bidders, a second-price auction with a random reserve price remains a maxmin mechanism among a subclass of dominant-strategy mechanisms.
中文摘要:
一件商品的单个单位被出售给一个风险中性的投标人,该投标人的私人已知价值是独立于相同的分布得出的。卖方仅掌握有限的价值分布信息,并认为价值分布是大自然为最大限度地减少收入而设计的。此外,卖方知道竞标者采用的是无中介策略。对于两个投标人的情况,我们构建了一个强大的maxmin解,该解由一个机制、一个价值分布和非中介策略中的均衡组成,使得卖方和自然都不能将收入转移到各自喜欢的方向,即使偏离者可以选择非中介策略的新均衡。机制和价值分布解决了一系列maxmin机制设计和minmax信息设计问题,而不管如何选择无中介策略中的平衡。maxmin机制是具有随机保留价格的第二价格拍卖。
讲座嘉宾简介:
杨湘黔,湖南大学助理教授,新加坡国立大学博士。主要研究领域为:信息设计、机制设计和博弈论。代表性研究成果中,一篇论文被国际会议WINE’22接受(~30%),另一篇在Journal of Economic Theory第二轮审稿。主持湖南省自然科学青年基金项目。