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Effects of Patent Length on R&D: A Quantitative DGE Analysis

  • Chu, Angus C.

This paper develops an R&D-growth model and calibrates the model to aggregate data of the US economy to quantify a structural relationship between patent length, R&D and consumption. Under parameter values that match the empirical flow-profit depreciation rate of patents and other key features of the US economy, extending the patent length beyond 20 years leads to a negligible increase in R&D despite equilibrium R&D underinvestment. In contrast, shortening the patent length leads to a significant reduction in R&D and consumption. Finally, this paper also analytically derives and quantifies a dynamic distortionary effect of patent length on capital investment.

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File URL: http://mpra.ub.uni-muenchen.de/16918/1/MPRA_paper_16918.pdf
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Paper provided by University Library of Munich, Germany in its series MPRA Paper with number 16918.

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Date of creation: Aug 2009
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Handle: RePEc:pra:mprapa:16918
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  1. Charles I. Jones & John C. Williams, 1998. "Measuring The Social Return To R&D," The Quarterly Journal of Economics, MIT Press, vol. 113(4), pages 1119-1135, November.
  2. Basu, Susanto & Fernald, John G, 1997. "Returns to Scale in U.S. Production: Estimates and Implications," Journal of Political Economy, University of Chicago Press, vol. 105(2), pages 249-83, April.
  3. Diego Comin, 2004. "R&D: A Small Contribution to Productivity Growth," Journal of Economic Growth, Springer, vol. 9(4), pages 391-421, December.
  4. Futagami, Koichi & Iwaisako, Tatsuro, 2007. "Dynamic analysis of patent policy in an endogenous growth model," Journal of Economic Theory, Elsevier, vol. 132(1), pages 306-334, January.
  5. Charles I. Jones, 1999. "Growth: With or Without Scale Effects?," American Economic Review, American Economic Association, vol. 89(2), pages 139-144, May.
  6. O'Donoghue, Ted & Zweimüller, Josef, 1998. "Patents in a Model of Endogenous Growth," Economics Series 56, Institute for Advanced Studies.
  7. Jaffe Adam B. & Lerner Josh, 2006. "Innovation and Its Discontents," Capitalism and Society, De Gruyter, vol. 1(3), pages 1-36, December.
  8. Romer, Paul M, 1990. "Endogenous Technological Change," Journal of Political Economy, University of Chicago Press, vol. 98(5), pages S71-102, October.
  9. L. Rachel Ngai & Roberto M. Samaniego, 2009. "Accounting for Research and Productivity Growth Across Industries," CEP Discussion Papers dp0914, Centre for Economic Performance, LSE.
  10. Rivera-Batiz, Luis A & Romer, Paul M, 1991. "Economic Integration and Endogenous Growth," The Quarterly Journal of Economics, MIT Press, vol. 106(2), pages 531-55, May.
  11. James Bessen, 2006. "The Value of U.S. Patents by Owner and Patent Characteristics," Working Papers 0603, Research on Innovation.
  12. Nancy T. Gallini, 2002. "The Economics of Patents: Lessons from Recent U.S. Patent Reform," Journal of Economic Perspectives, American Economic Association, vol. 16(2), pages 131-154, Spring.
  13. Daron Acemoglu, 2007. "Introduction to Modern Economic Growth," Levine's Bibliography 122247000000001721, UCLA Department of Economics.
  14. Kwan, Yum K. & Lai, Edwin L. -C., 2003. "Intellectual property rights protection and endogenous economic growth," Journal of Economic Dynamics and Control, Elsevier, vol. 27(5), pages 853-873, March.
  15. Jones, Charles I, 1995. "Time Series Tests of Endogenous Growth Models," The Quarterly Journal of Economics, MIT Press, vol. 110(2), pages 495-525, May.
  16. Jones, Charles I, 1995. "R&D-Based Models of Economic Growth," Journal of Political Economy, University of Chicago Press, vol. 103(4), pages 759-84, August.
  17. Judd, Kenneth L, 1985. "On the Performance of Patents," Econometrica, Econometric Society, vol. 53(3), pages 567-85, May.
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