This book presents the most important published articles of Martin Shubik who has made a path-breaking contribution to game theory and political economy. The volume shows how game theory can be used to explore fundamental problems in economics, political science and operations research. The book opens with an introduction to the career of Martin Shubik and the influences which have shaped his research. In this, and the chapters which follow, Martin Shubik stresses the importance of formulative models as playable games and the treatment of information to describe decision making among individuals, using examples from industrial organization. He demonstrates that games are a fruitful way to extend our knowledge of competition among the few. In addition, he considers the importance of gaming in economics and business suggesting that experimental games can be used to illustrate problems and principles in multi-person decision making. This book will be welcomed by economists, game theorists, political scientists, and operations researchers.