Abstract
This paper looks more closely at the sources of patent growth in the United States since 1984. It confirms that the increase is largely due to U.S. patenters, with an earlier surge in Asia, and some increase in Europe. Growth has taken place in all technologies, but not in all industries, being concentrated in the electrical, electronics, computing, and scientific instruments industries. It then examines whether these patents are valued by the market. We know from survey evidence that patents in these industries are not usually considered important for appropriability, but are sometimes considered necessary to secure financing for entering the industry. I compare the market value of patents held by entrant firms to those held by incumbents (controlling for R&D). Using data on publicly traded firms 1980–1989, I find that in industries based on electrical and mechanical technologies the market value of entrants’ patents is positive in the post-1984 period (after the patenting surge), but not before, when patents were relatively unimportant in these industries. Also, the value of patent rights in complex product industries (where each product relies on many patents held by a number of other firms) is much higher for entrants than incumbents in the post-1984 period. For discrete product industries (where each product relies on only a few patents, and where the importance of patents for appropriability has traditionally been higher), there is no difference between incumbents and entrants.
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References
Barton, J.H., and S.J. Parapatt, 1998, ‘Patent Litigation and Its Relationship to Industry Structure and Competition in the Photographic Film and Camera Industry,’ Conference Paper, Intellectual Property and Industry Competitive Standards, Stanford University, April.
Cohen, W.M., R.R. Nelson, and J.P. Walsh, 2000, ‘Protecting Their Intellectual Assets: Appropriability Conditions and Why Firms Patent or Not?,’ NBER Working Paper No., 7552.
Griliches, Z., 1981, ‘Market Value, R&D, and Patents,’ Economic Letters, 7, 183–187.
Grindley, P.C., and D.J. Teece, 1997, “Managing Intellectual Capital: Licensing and Cross-Licensing in Semiconductors and Electronics,’ California Management Review 39(2), 1–34.
Hall, B.H., 1993, ‘Industrial Research During the 1980s: Did the Rate of Return Fall?’ Brookings Papers on Economic Activity Microeconomics 1993(2), 289–344.
Hall, B.H., A. Jaffe, and M. Trajtenberg, 2005, ‘Market Value and Patent Citations,’ Rand Journal of Economics, 36, (Spring).
Hall, B.H., A. Jaffe, and M. Trajtenberg, 2002, ‘The NBER Patent Citations Data File: Lessons, Insights and Methodological Tools,’ in Patents, Citations and Innovations, A. Jaffe and M. Trajtenberg (eds.), Cambridge, MA: The MIT Press.
Hall, B.H. and R.H. Ziedonis, 2001, ‘The Determinants of Patenting in the U. S. Semiconductor Industry, 1980–1994,’ Rand Journal of Economics 32, 101–128.
Kim, J., and G. Marschke, 2004, ‘Accounting for the Recent Surge in U.S. Patenting: Changes in R&D expenditures, Patent Yields, and the High Tech Sector,’ Economics of Innovation and New Technology 13(6), 543–558.
Kortum, S., and J. Lerner, 2003, ‘Unraveling the Patent Paradox,’ AEA Annual Meeting. Washington, DC.
Kortum, S., and J. Lerner, 2000, ‘Assessing the Contribution of Venture Capital to Innovation,’ Rand Journal of Economics 31(4), 674–692.
Kortum, S., and J. Lerner, 1998, ‘Stronger Protection or Technological Revolution: What Is Behind the Recent Surge in Patenting?,’ Carnegie-Rochester Conference Series on Public Policy 48, 247–304.
Levin, R.C., A.K. Klevorick, R.R. Nelson, and S.G, Winter, 1987, ‘Appropriating the Returns from Industrial Research and Development.’ Brookings Papers on Economic Activity, 3, 783–832.
Ziedonis, R.H., 2004, ‘Don’t Fence Me in: Fragmented Markets for Technology and the Patent Acquisition Strategies of Firms,’ Management Science, 50(6), 804–820.
Ziedonis, R.H., and B.H. Hall, 2001, ‘The Effects of Strengthening Patent Rights on firms Engaged in Cumulative Innovation: Insights from the Semiconductor Industry,’ in Entrepreneurial Inputs and Outcomes: New Studies of Entrepreneurship in the United States, Vol. 13, Advances in the Study of Entrepreneurship, Innovation, and Economic Growth, Libecap, Gary (ed.), Amsterdam: Elsevier Science.
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Hall, B.H. (2005). Exploring the Patent Explosion. In: Link, A.N., Scherer, F.M. (eds) Essays in Honor of Edwin Mansfield. Springer, Boston, MA. https://doi.org/10.1007/0-387-25022-0_15
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DOI: https://doi.org/10.1007/0-387-25022-0_15
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