Citation Frequency and the Value of Patented Innovation

Harhoff, Dietmar; Narin, Francis; Scherer, F. M.; Vopel , Katrin

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Citation Frequency and the Value of Patented Innovation

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http://www.jstor.org/stable/2646773
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Harhoff, D., Narin, F., Scherer, F. M., & Vopel, K. (1999). Citation Frequency and the Value of Patented Innovation. Review of Economics and Statistics, 81(3), 511-515.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0019-9312-F

Abstract

Through a survey, private economic value estimates were obtained on 964 inventions made in the United States and Germany and on which German patent renewal fees were paid to full-term expiration in 1995. A search of subsequent U.S. and German patents yielded counts of citations to those patents. Patents renewed to full-term were significantly more highly cited than patents allowed to expire before their full term. The higher an invention's economic value estimate was, the more the patent was subsequently cited.