The Economics of Alfred Marshall brings together a number of leading international scholars for a timely reappraisal of Marshall's contribution to the development of economics. The aims of the contributors are firstly to revisit the work of Alfred Marshall and to investigate the unity of his projects, which contemporary authors often tend to underestimate; and secondly to show how Marshall's approach is not only a subject for historians of economic thought, but may also provide a message that is relevant for the progress of economics.