The more than 100 competition/antitrust laws around the world play major roles both at home and in other countries. They influence each other in ways that affect decisions everywhere. The book is a new kind of guide that makes this world accessible to anyone, anywhere. It provides a new set of tools to organize the vast amount of data about competition laws in ways that reveal what is happening and what is driving decisions. Using a global perspective, it defines competition law in a way that is applicable to all competition law systems and then examines competition law goals, methods, and institutions and the forces that drive them. It devotes an entire chapter each to US antitrust law and European competition law as well as sections for East Asian, Latin American, and developing country competition law patterns. It shows how competition law regimes relate to each other as parts of a global system with its own patterns and dynamics. Transnational public and private institutions, including law firms, management and economic consultancy firms, accounting firms, and others are part of this system. By combining clear analysis of the elements of individual regimes with the transborder forces that influence them, it gives lawyers, students, officials, and scholars the tools they need to understand and operate in this complex and often misunderstood world.