This book provides a comprehensive, up-to-date, and expert synthesis of location theory. What are the impacts of a firm's geographic location on the locations of customers, suppliers, and competitors in a market economy? How, when, and why does this result in the clustering of firms in space? When and how is society made better or worse off as a result? This book uses dozens of locational models to address aspects of these three questions. Classical location problems considered include Greenhut-Manne, Hitchcock-Koopmans, and Weber-Launhardt. The book reinterprets competitive location theory, focusing on the linkages between Walrasian price equilibrium and the localization of firms. It also demonstrates that