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Optimal Patent Length and Patent Width for an Economy with Creative Destruction and Non-Diversifiable Risk

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  • Tapio Palokangas

Abstract

This study examines optimal public policy in a product cycle model where R&D firms innovate and imitate and households face non-diversifiable risk. The government controls product cycles by two policy instruments: patent length, i.e. the expected time an innovation is imitated, and patent width, i.e. the innovator's profit after a successful imitation relative to that before. The main results are the following. An increase in patent length or patent width slows down economic growth. The more patient or the less risk averse the households, the longer and narrower the optimal patents.

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Bibliographic Info

Paper provided by DEGIT, Dynamics, Economic Growth, and International Trade in its series DEGIT Conference Papers with number c014_024.

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Length: 32 pages
Date of creation: Jun 2009
Date of revision:
Handle: RePEc:deg:conpap:c014_024

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Related research

Keywords: Patents; imitation; innovation; product cycles;

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References

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  1. Ryo Horii & Tatsuro Iwaisako, 2005. "Economic Growth with Imperfect Protection of Intellectual Property Rights," Discussion Papers in Economics and Business 05-23, Osaka University, Graduate School of Economics and Osaka School of International Public Policy (OSIPP).
  2. Aghion, Philippe & Harris, Christopher & Vickers, John, 1997. "Competition and growth with step-by-step innovation: An example," European Economic Review, Elsevier, vol. 41(3-5), pages 771-782, April.
  3. Walde, Klaus, 1999. "Optimal Saving under Poisson Uncertainty," Journal of Economic Theory, Elsevier, vol. 87(1), pages 194-217, July.
  4. Harris, Christopher & Howitt, Peter & Vickers, John & Aghion, Philippe, 2001. "Competition, Imitation and Growth with Step-by-Step Innovation," Scholarly Articles 12375013, Harvard University Department of Economics.
  5. Dixit, Avinash K, 1986. "Comparative Statics for Oligopoly," International Economic Review, Department of Economics, University of Pennsylvania and Osaka University Institute of Social and Economic Research Association, vol. 27(1), pages 107-22, February.
  6. Mukoyama, Toshihiko, 2003. "Innovation, imitation, and growth with cumulative technology," Journal of Monetary Economics, Elsevier, vol. 50(2), pages 361-380, March.
  7. Segerstrom, P.S., 1990. "Innovation, Imitation And Economic Growth," Papers 8818, Michigan State - Econometrics and Economic Theory.
  8. Ethier, Wilfred J, 1982. "National and International Returns to Scale in the Modern Theory of International Trade," American Economic Review, American Economic Association, vol. 72(3), pages 389-405, June.
  9. Tang, Paul J. G. & Walde, Klaus, 2001. "International competition, growth and welfare," European Economic Review, Elsevier, vol. 45(8), pages 1439-1459, August.
  10. Aghion, Philippe, et al, 2001. "Competition, Imitation and Growth with Step-by-Step Innovation," Review of Economic Studies, Wiley Blackwell, vol. 68(3), pages 467-92, July.
  11. Vesa Kanniainen & Rune Stenbacka, 2000. "Endogenous Imitation and Implications for Technology Policy," Journal of Institutional and Theoretical Economics (JITE), Mohr Siebeck, Tübingen, vol. 156(2), pages 360-, June.
  12. Tapio Palokangas, 2008. "Competition and product cycles with non-diversifiable risk," Journal of Economics, Springer, vol. 94(1), pages 1-30, 06.
  13. Walde, Klaus, 1999. "A Model of Creative Destruction with Undiversifiable Risk and Optimising Households," Economic Journal, Royal Economic Society, vol. 109(454), pages C156-71, March.
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