in most academic programs, largely being confined to Industrial Organization, i.e., issues of public policy towards enterprise with emphasis on antitrust and regulatory policy. This subject definition leaves out a number of interesting and important questions about how industries evolve over time, what the role of technological change (and organizational change) is in that process, and the associated structural changes within industries and firms. The object of this book is to derme these issues and suggest a framework within which they can be analyzed. I would like to thank all the conference participants for their contributions, particularly my colleagues at CWRU, Asim Erdilek and William S. Peirce, without whose encouragement and support the conference would not have taken place.