"Edith Penrose has been one of the most significant economists of the second part of the twentieth century. Her contribution to the theory of the firm has reinvented and productively developed the classical tradition in economics. It has informed the currently dominant resource/knowledge-based theory of the firm. Penrose's contribution, however, extends to a great variety of areas, to include industry organization, strategic management, international business, human resource management, economics of innovation and technological change, history, methodology, macroeconomics, and much more."