抄録
Silicon-Valley has turned out many high-tech start-ups even after the IT Bubble burst. Many students from abroad who have studied technology and science have gathered in the region. They have established their own start-ups. They repeat entrepreneurial activities until getting IPOs or Buyouts. These serial entrepreneurial activities are supported by the fact that potential executives and engineers are pooled in the region and are thrown into start-ups exactly when necessary. In addition, VC's early reductions of start-ups which do not show probability of growth accelerate serial entrepreneurial activities.
