This paper studies a robust version of the classic surplus extraction problem, in which the designer knows only that the beliefs of each type belong to some set, and designs mechanisms that are suitable for all possible beliefs in that set. We derive necessary and sufficient conditions for full...

This paper shows that up-front payments can play a crucial role in providing efficient investment incentives when contracts are incomplete. They can eliminate the overinvestment effect identified by Rogerson [1984] and Shavell [1980] when courts use an expectation damage remedy. This method...