讲座内容：

We consider mechanisms that provide the opportunity to exchange commodity i for commodity j, for certain ordered pairs ij: Given any connected graph G of opportunities, we show that there is a unique G-mechanism that satisfies some natural conditions of fairness and convenience.  Next we define time and price complexity for any G-mechanism as (respectively) the time required to exchange i for j; and the information needed to determine the exchange ratio (each for the worst pair ij). If the number of commodities exceeds three, there are precisely three minimally complex G-mechanisms, where G corresponds to the star, cycle and complete graphs. The star mechanism has a distinguished commodity .the money .that serves as the sole medium of exchange and mediates trade between decentralized markets for the other commodities. Furthermore, for any weighted sum of complexities, the star mechanism is the unique minimizer of the sum for large enough .

讲座人介绍：

       Pradeep Dubey，计量经济学会会士（fellow of The Econometric Society），纽约州立大学石溪分校经济系首席教授（leading professor）及该校博弈论研究中心联合主任（codirector）。纽约州立大学石溪分校博弈论研究中心是国际上博弈论研究最重要的几个中心之一，其每年组织的会议是博弈论领域最重要的年会。Dubey教授主要研究兴趣是博弈论和数理经济学，是国际顶尖的博弈论专家。Dubey教授在博弈论领域做出了卓越贡献，有很多重要论文发表在Econometrica、Quarterly Journal of Economics、Journal of Economic Theory、Mathematics of Operations Research以及Games and Economic Behavior 等顶级期刊。Dubey教授目前还是国际博弈论学会理事会成员（council member of Game Theory Society）。

注意：
1.由于前沿讲座时间不固定，为方便各位同学预约，之后前沿讲座发布时间将固定为上午10:00或下午16:00，请各位同学关注。
2.网上预约所要求填写的学号与姓名均为必填项，且须与本人一卡通完全一致，否则会导致最终预约不成功。
3.讲座开始前工作人员收一卡通记次数，讲座结束后归还。预约而未听讲座、讲座迟到早退者均倒扣一次，未预约而去听讲座不计次数。