Patent Protection: Of What Value and for How Long?
Empirical estimates of the private value of patent protection are found for four technology area - computers, textiles, combustion engines, and pharmaceuticals - using new patent data for West Germany, 1953-1988. Patentees must pay to keep their patents in force. A dynamic stochastic discrete choice model of optimal renewal decisions is developed incorporating both learning about an innovation and the market as well as the possibility of infringements. The evolution of the distribution of returns over the life of a group of patents is calculated for each technology using a minimum distance simulation estimator. Results indicate that learning is completed within 6 years, that obsolescence is rapid, and that the distributions of patent value are very skewed. Research and development (R&D) expenditures are calculated and patent protection as an implicit subsidy to investment in R&D discussed.
|Date of creation:||Sep 1993|
|Date of revision:|
|Publication status:||published as The Review of Economic Studies, Vol 65 (1998): 671-710.|
|Contact details of provider:|| Postal: National Bureau of Economic Research, 1050 Massachusetts Avenue Cambridge, MA 02138, U.S.A.|
Web page: http://www.nber.org
More information through EDIRC
References listed on IDEAS
Please report citation or reference errors to , or , if you are the registered author of the cited work, log in to your RePEc Author Service profile, click on "citations" and make appropriate adjustments.:
- Pakes, Ariel & Schankerman, Mark A., 1978.
"The Rate of Obsolescence of Knowledge, Research Gestation Labs, and the Private Rate of Return to Research Resources,"
78-13, C.V. Starr Center for Applied Economics, New York University.
- Ariel Pakes & Mark Schankerman, 1979. "The Rate of Obsolescence Of Knowledge, Research Gestation Lags, and the Private Rate of Return to Research Resources," NBER Working Papers 0346, National Bureau of Economic Research, Inc.
- repec:fth:prinin:270 is not listed on IDEAS
- Ashenfelter, O. & Bloom, D., 1990.
"Lawyers As Agents Of The Devil In A Prisoner'S Dilemma Game,"
57, Princeton, Woodrow Wilson School - Discussion Paper.
- Orley Ashenfelter & David Bloom, 1993. "Lawyers as Agents of the Devil in a Prisoner's Dilemma Game," NBER Working Papers 4447, National Bureau of Economic Research, Inc.
- Orley Ashenfelter & David E. Bloom & Gordon B. Dahl, 2013. "Lawyers as Agents of the Devil in a Prisoner's Dilemma Game," Working Papers 1451, Princeton University, Department of Economics, Industrial Relations Section..
- McFadden, Daniel, 1989.
"A Method of Simulated Moments for Estimation of Discrete Response Models without Numerical Integration,"
Econometric Society, vol. 57(5), pages 995-1026, September.
- Daniel McFadden, 1987. "A Method of Simulated Moments for Estimation of Discrete Response Models Without Numerical Integration," Working papers 464, Massachusetts Institute of Technology (MIT), Department of Economics.
- Pakes, Ariel, 1985.
"On Patents, R&D, and the Stock Market Rate of Return,"
Journal of Political Economy,
University of Chicago Press, vol. 93(2), pages 390-409, April.
- Pakes, Ariel, 1985. "On Patents, R & D, and the Stock Market Rate of Return," Scholarly Articles 3436409, Harvard University Department of Economics.
- Bronwyn H. Hall & Zvi Griliches & Jerry A. Hausman, 1984. "Patents and R&D: Is There A Lag?," NBER Working Papers 1454, National Bureau of Economic Research, Inc.
- Zvi Griliches, 1998.
"Patent Statistics as Economic Indicators: A Survey,"
in: R&D and Productivity: The Econometric Evidence, pages 287-343
National Bureau of Economic Research, Inc.
- Griliches, Zvi, 1990. "Patent Statistics as Economic Indicators: A Survey," Journal of Economic Literature, American Economic Association, vol. 28(4), pages 1661-1707, December.
- Zvi Griliches, 1990. "Patent Statistics as Economic Indicators: A Survey," NBER Working Papers 3301, National Bureau of Economic Research, Inc.
- Mansfield, Edwin & Schwartz, Mark & Wagner, Samuel, 1981. "Imitation Costs and Patents: An Empirical Study," Economic Journal, Royal Economic Society, vol. 91(364), pages 907-18, December.
- Cockburn, Iain & Griliches, Zvi, 1988.
"Industry Effects and Appropriability Measures in the Stock Market's Valuation of R&D and Patents,"
American Economic Review,
American Economic Association, vol. 78(2), pages 419-23, May.
- Iain Cockburn & Zvi Griliches, 1987. "Industry Effects and Appropriability Measures in the Stock Markets Valuation of R&D and Patents," NBER Working Papers 2465, National Bureau of Economic Research, Inc.
- Richard Gilbert & Carl Shapiro, 1990.
"Optimal Patent Length and Breadth,"
RAND Journal of Economics,
The RAND Corporation, vol. 21(1), pages 106-112, Spring.
- Jean Olson Lanjouw, 1992.
"Under threat: potential competition, litigation and the private value of patent protection,"
LSE Research Online Documents on Economics
6777, London School of Economics and Political Science, LSE Library.
- Jean Olson Lanjouw, 1992. "Under Threat: Potential Competition, Litigation and the Private Value of Patent Protection," STICERD - Economics of Industry Papers 06, Suntory and Toyota International Centres for Economics and Related Disciplines, LSE.
- repec:fth:harver:1473 is not listed on IDEAS
When requesting a correction, please mention this item's handle: RePEc:nbr:nberwo:4475. See general information about how to correct material in RePEc.
For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: ()
If references are entirely missing, you can add them using this form.