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

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  • Chu, Angus C.

Abstract

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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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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Keywords: innovation-driven growth; intellectual property rights; patent length; R&D;

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References

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  1. 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.
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  11. Paul M Romer, 1999. "Endogenous Technological Change," Levine's Working Paper Archive 2135, David K. Levine.
  12. 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.
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Cited by:
  1. Furukawa, Yuichi, 2010. "Intellectual property protection and innovation: an inverted-U relationship," Economics Letters, Elsevier, vol. 109(2), pages 99-101, November.
  2. Chu, Angus C. & Leung, Charles K.Y. & Tang, Edward, 2012. "Intellectual property rights, technical progress and the volatility of economic growth," Journal of Macroeconomics, Elsevier, vol. 34(3), pages 749-756.
  3. Chu, Angus C., 2009. "Macroeconomic Effects of Intellectual Property Rights: A Survey," MPRA Paper 17342, University Library of Munich, Germany.
  4. Chu, Angus C., 2011. "The welfare cost of one-size-fits-all patent protection," Journal of Economic Dynamics and Control, Elsevier, vol. 35(6), pages 876-890, June.
  5. Shiyuan Pan & Heng-fu Zou & Tailong Li, 2010. "Patent Protection, Technological Change and Wage Inequality," CEMA Working Papers 437, China Economics and Management Academy, Central University of Finance and Economics.

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