This book, originally published in 1975, is an attempt to bridge the gap between economic theory and business practice by relating the tools of economic analysis to the decision making process itself. It is written from a decision making systems analysis viewpoint. This approach enables the reader to perceive the integrative nature of the subject matter in relation to the functioning of the business enterprise. Although the unifying theme of ‘decision making’ is at the heart of the book, where necessary some of the theoretical underpinnings of traditional neo-classical theory of the firm are covered.