This is a self-contained introduction to basic issues and techniques of decision theory. From classical optimization to modern game theory, the authors show the increasing importance of mathematical knowledge for sustained competitive advantage in decision making. Students need only a basic understanding of elementary calculus and probability to use the book effectively. Through an imaginative selection of topics, the authors treat decision and game theory as part of one body of knowledge. They move from problems involving the individual decision maker to progressively more complex problems such as sequential rationality, auctions, and bargaining. By building each chapter on material presented earlier, the authors ensure that the text is clear and accessible to all.