Input-output analysis is the main tool of applied equilibrium analysis. This textbook is a systematic survey of its most recent developments and their applications, teaching students how to apply their knowledge to concrete economies. The national accounts of an economy are presented in detail and then used to build an economic model. Numbers are put on seemingly slippery issues such as efficiency, competitiveness, environmental protection, and globalization effects. Exercises and review questions are included at the end of each chapter, and solutions at the end of the book.