The great economist, Alfred Marshall, said of industrial districts: "The mysteries of the trade...are as it were in the air...." This seminar reports on a project that addresses the "mysteries" of the Valley (at least to many of the people who want to replicate it). Key topics to be discussed are a habitat that is unmatched in its ability to create new firms and take ideas to market rapidly, the edge provided by communities of practice, the high quality and highly mobile labor force, the various roles of government in the rise of the Valley, and how changes in technology and markets have favored it. Henry S. Rowen is Director of the Asia/Pacific Research Center at Stanford University. He is a senior fellow at the Hoover Institution and the Edward B. Rust professor emeritus at the University's Graduate School of Business. From 1989 to 1991, Rowen was the assistant secretary of defense for international security affairs in the U.S. Department of Defense. He was also chairman of the National Intelligence Council from 1981 to 1983, served as president of the RAND Corporation from 1968 to 1972 and was assistant director of the U.S. Bureau of the budget from 1965 to 1966. He recently was the editor of Behind East Asian Growth: The Political and Social Foundations of Prosperity, published by Routledge Press, 1998. At the present time, he is co-editing a book on how the Silicon Valley system of innovation and entrepreneurship works. The next phase of this project will examine high technology centers in Asia.