Unique Implementation of Action Profiles: Necessary and Sufficient Conditions

I study the general problem of a principal who desires to implement a given vector of actions and pay the agents according to a given compensation scheme. Previous work has provided mechanisms for implementation in various special cases. In this article, I fully characterize the set of action profiles and compensation schemes implementable in subgame-perfect equilibrium, providing necessary and sufficient conditions for implementation. Copyright Economics Department of the University of Pennsylvania and the Osaka University Institute of Social and Economic Research Association