How should one regulate a firm when its investment may cause a negative externality? In this paper we present a model on regulating a firm run by a manager and owned by a shareholder. The regulator can impose a penalty on the manager, the shareholder, or both. Our characterization of optimal...

In this paper, we present a model of defensive mergers and merger waves. We argue that mergers and merger waves can occur when managers prefer that their firms remain independent rather than be acquired. We assume that managers can reduce their chance of being acquired by acquir-ing another firm...