Going Soft: How the Rise of Software Based Innovation Led to the Decline of Japan's IT Industry and the Resurgence of Silicon Valley
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This paper documents a shift in the nature of innovation in the information technology (IT) industry. Using comprehensive data on all IT patents granted by the USPTO from 1980-2002, we find strong evidence of a change in IT innovation that is systematic, substantial, and increasingly dependent on
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美国国家经济研究局创建时间：
2010-07-01
