In view of the uncertainty over the ability of merging firms to achieve efficiency gains, we model the post-merger situation as a Cournot oligopoly wherein the outsiders face uncertainty about the merged entity's final cost. At the Bayesian equilibrium, a bilateral merger is profitable provided...

The paper addresses the problem of information asymmetry between a regulator and the polluting firms and proposes a very simple mechanism where the regulator is free to choose, without communicating in advance to the firms, between two instruments: an effluent fee or a standard: as a result in a...