Recently, initial attempts have been made to understand the patterns of corporate technological diversification and their implications on economic and managerial dimensions....

The past two decades have seen a gradual but noticeable change in the economic organization of innovative activity. Most firms used to integrate research and development with activities such as production, marketing, and distribution....

The contributions to this study of the origins of centers of industrial and technological innovation (such as Silicon Valley) reveal that these concentrated \"clusters\" of entrepreneurial high tech firms are characterized by rapid economic growth....