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 for any...

In a class of informed principal problems with common values often used in applications we de…fine a particular mechanism which we call the assured allocation. It is always undominated, i.e. efficient among the different types of the principal. We show it is a perfect Bayesian equilibrium...

This paper considers an agency model in which the principal is privately informed of her production technology. In our model, the principal can require the agent to adopt the principal's technology for production, or alternatively, to adopt a technology in the market. Information about the...