We analyze the optimal antitrust enforcement against collusion under asymmetric information with a continuum of types. We focus on prudential deterrence, by imposing that expected fines cannot induce losses even off the equilibrium path. Due to incentive compatibility, efficient cartels enjoy...

We examine the issue of whether two monopolists which produce substitutable goods should be regulated by one (centralization) or two (decentralization) regulatory authorities, when the regulator(s) can be partially captured by industry. Under full information, two decentralized agencies - each...

This paper analyses in a hidden characteristic set-up the design of the optimal price for a firm which is a monopolist at home but competes abroad against foreign firms. As long as diseconomies of scope are not too strong, the optimal price is identified. The price rule depends on the sign of...

We examine the regulatory design of a market for products with interdependent demands, where regulated firms provide (imperfect) substitutes and can engage in lobbying activities. Under centralized regulation, a single regulator is established, whose mandate is to maximize aggregate welfare....