1 假设有四个人参与竞标 第二密封价格拍卖 但是四个竞标人知道相互之间的valuation 也就是 完全信息模型 假设 V1大于V2大于V3大于V4  当第四个竞标者得到该物的纳什均衡？

2 consider the 3-bidder auction model. each bidder's valuation Vi is uniformly distributed on [0,1], and independent of the other bidder's valuations, for i=1,2,3. show that in the second price auction it is weakly dominat for each bidder to bid his true valuation, that is Bi(v)=v. derive the expected payment of any bidder in the second price auction