(When) Does Patent Protection Spur Cumulative Research Within Firms?
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We estimate the effect of patent protection on follow-on investments in corporate scientific research. We exploit a new method for identifying an exogenous reduction in the protection a granted patent provides. Using data on public, research-active firms between 1990 and 2015, we find that firms
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美国国家经济研究局创建时间：
2021-06-01
