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 No other analysts have examined how such clusters start, although many earlier works озьха have studied Silicon Valley The study's contributors conclude that the key public and business policy elements of starting a cluster are common to many regions, countries, and time periods.  DostoyeISBN 0521827221.