This book examines the role of strategic visions of future technological development in the evolution of market structure. This perspective offers a novel way of resolving some of the puzzles that have arisen in understanding the effects of rapid technology change and market structure. Strategic visions are seen to play a central role in corporate strategy, and industrial policy. The authors develop some theoretical tools to study these questions, and present 5 case studies of high technology industries, with conclusions for policy. The book will be of interest to industrial economists concerned with the effects of rapid technological change, and to those interested in technology management. It will also be of interest to economists and others working in high technology industries, and in government.