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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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  1. Diego Comin, 2004. "R&D: A Small Contribution to Productivity Growth," NBER Working Papers 10625, National Bureau of Economic Research, Inc.
  2. Ted O'Donoghue & Josef Zweim¸ller, 2004. "Patents in a Model of Endogenous Growth," Journal of Economic Growth, Springer, vol. 9(1), pages 81-123, 03.
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  8. 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.
  9. 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.
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  11. Judd, Kenneth L, 1985. "On the Performance of Patents," Econometrica, Econometric Society, vol. 53(3), pages 567-85, May.
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  13. 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.
  14. Bessen, James, 2008. "The value of U.S. patents by owner and patent characteristics," Research Policy, Elsevier, vol. 37(5), pages 932-945, June.
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  16. 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.
  17. Daron Acemoglu, 2007. "Introduction to Modern Economic Growth," Levine's Bibliography 122247000000001721, UCLA Department of Economics.
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Cited by:
  1. Chu, Angus C. & Leung, Charles Ka Yui & TANG, C. H. Edward, 2012. "Intellectual property rights, technical progress and the volatility of economic growth," MPRA Paper 38132, University Library of Munich, Germany.
  2. 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.
  3. 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.
  4. Chu, Angus C., 2009. "Macroeconomic Effects of Intellectual Property Rights: A Survey," MPRA Paper 17342, University Library of Munich, Germany.
  5. Furukawa, Yuichi, 2010. "Intellectual property protection and innovation: an inverted-U relationship," Economics Letters, Elsevier, vol. 109(2), pages 99-101, November.

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