We investigate the issue of implementation via individually rational ex-post budget-balanced Bayesian mechanisms. We demonstrate that all social choice rules that generate a nonnegative ex-ante surplus, including ex-post efficient ones, can generically be implemented via such mechanisms. The...

We study the informed-principal problem in a bilateral asymmetric information trading setting with interdependent values and quasi-linear utilities. The informed seller proposes a mechanism and voluntarily certifies information about the good's characteristics. When the set of certifiable...

We present a common value mechanism design model for an informed principal where only the principal has private information, but her one-dimensional private information is allowed to be distributed according to any probability measure. For this model we characterize the set of pure-strategy...

We consider the situation where the owner of some good wants to sell the good to one of several potential buyers. We assume that the owner possesses private information about the buyers' valuations of the good, and analyze this model as an informed principal mechanism design model. In an...

We study the informed-principal problem in a bilateral asymmetric information trading setting with interdependent values and quasi-linear utilities. The informed seller proposes a mechanism and voluntarily certifies information about the good's characteristics. When the set of certifiable...

We consider the situation where the owner of some good wants to sell the good to one of several potential buyers. We assume that the owner possesses private information about the buyers' valuations of the good, and analyze this model as an informed principal mechanism design model. In an...

We present a common value mechanism design model for an informed principal where only the principal has private information, but her one-dimensional private information is allowed to be distributed according to any probability measure. For this model we characterize the set of pure-strategy...

In this paper we address the question of collusion in mechanisms under asymmetric information. We develop a methodology to analyze collusion as an informed principal problem. First, if collusion occurs after the agents accept or reject the principal's offer; the dominant-strategy implementation...

We study optimal selling strategies of a seller who is poorly informed about the buyer’s value for the object. When the maxmin seller only knows that the mean of the distribution of the buyer's valuations belongs to some interval then nature can keep him to payoff zero no matter how much...

This paper explores the sale of an object to an ambiguity averse buyer. We show that the seller can increase his profit by using an ambiguous mechanism. That is, the seller can benefit from hiding certain features of the mechanism that he has committed to from the agent. We then characterize the...