Two players seek to co-ordinate their behavior in an incomplete information setting. We show that if each player's preferences over his opponent's action is independent of his own action or type, then cheap talk cannot expand the set of equilibrium outcomes.

We study the implementation problem for exchange economies when agents can renegotiate the outcome assigned by the planner and can collude. We focus on the use of sequential mechanisms and present a simple sufficient condition for implementation with renegotiation in strong perfect equilibrium....

It is well-known that, when agents in an organization possess private information that is unverifiable by an outside party, games where agents simply announce their information can have multiple equilibria that may impede the successful implementation of the organization's objectives. We show...

We study a multilateral negotiation procedure that allows for "partial agreements" in which responders are told only their own shares. Applications of our model include negotiations under "joint and several liability." Unlike previous models of multilateral bargaining with exit, we find that...

We study trading models when the distribution of signals such as costs or values is not known to traders or the mechanism designer when the profit-maximizing trading procedure is designed. We present adaptive mechanisms that simultaneously elicit this information (market research) while...