Auction theory has emphasized the importance of private information to the profits of bidders. However, the theory has failed to consider the question of whether or not bidders will be able to keep their information private. We show that in a variety of contexts bidders will reveal all their...

It is well known that when players have private information, vis a vis the designer, and their preferences coincide it is hard to implement the socially desirable outcome. We show that with arbitrarily small fines and arbitrarily noisy inspections, the social choice correspondence can be fully...

We study the problem of a regulator who must control the emissions of a given pollutant from a series of industries when the firms' abatement costs are unknown. We develop a mechanism in which the regulator asks firms to report their abatement costs and implements the most stringent emissions...