The issue of international antitrust enforcement is high on the agenda for both developed and developing countries. Bilateral cooperation between antitrust agencies, in particular the European Commission and US agencies, is the focus of this new work. It first shows how bilateral cooperation was developed as a response to the limits of the unilateral and extraterritorial application of national competition laws, and how it has evolved from an instrument initially designed to avoid conflicts into a tool aimed at coordinating joint investigations of international competition cases. It then...