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The welfare cost of one-size-fit-all patent protection

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  • Chu, Angus C.

Abstract

To analyze the welfare gain from allowing for differentiated patent protection across sectors, this study develops a two-sector quality-ladder growth model in which patent breadth is a policy variable and derives the optimal patent breadth under two policy regimes. We show that (i) the optimal uniform patent breadth is a weighted average of the optimal sector-specific patent breadth, and (ii) the optimal sector-specific patent breadth is larger in the sector that has a larger market size and more technological opportunities. To derive the optimal policy, we allow for an arbitrary path of patent breadth and derive the optimal path by solving a Stackelberg differential game. We find that the optimal path of patent breadth under each regime is stationary, time-consistent and subgame perfect. Finally, we perform a numerical investigation and find that even a moderate degree of asymmetry across sectors can generate a significant welfare cost of uniform patent protection.

Suggested Citation

  • Chu, Angus C., 2009. "The welfare cost of one-size-fit-all patent protection," MPRA Paper 21401, University Library of Munich, Germany, revised Mar 2010.
  • Handle: RePEc:pra:mprapa:21401
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    References listed on IDEAS

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    11. Angus Chu, 2009. "Effects of blocking patents on R&D: a quantitative DGE analysis," Journal of Economic Growth, Springer, vol. 14(1), pages 55-78, March.
    12. Angus Chu, 2010. "Effects of patent length on R&D: a quantitative DGE analysis," Journal of Economics, Springer, vol. 99(2), pages 117-140, March.
    13. Angus C. Chu, 2008. "Special Interest Politics And Intellectual Property Rights: An Economic Analysis Of Strengthening Patent Protection In The Pharmaceutical Industry," Economics and Politics, Wiley Blackwell, vol. 20(2), pages 185-215, June.
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    19. Klenow, Peter J., 1996. "Industry innovation: where and why," Carnegie-Rochester Conference Series on Public Policy, Elsevier, vol. 44(1), pages 125-150, June.
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    Full references (including those not matched with items on IDEAS)

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    As found by EconAcademics.org, the blog aggregator for Economics research:
    1. Optimizing patent law design is hard, why not drop it
      by Economic Logician in Economic Logic on 2010-04-19 19:04:00

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    Cited by:

    1. 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.
    2. Angus C. Chu & Yuichi Furukawa & Lei Ji, 2016. "Patents, R&D subsidies, and endogenous market structure in a schumpeterian economy," Southern Economic Journal, Southern Economic Association, vol. 82(3), pages 809-825, January.
    3. Angus Chu & Guido Cozzi & Chih-Hsing Liao, 2013. "Endogenous fertility and human capital in a Schumpeterian growth model," Journal of Population Economics, Springer;European Society for Population Economics, vol. 26(1), pages 181-202, January.
    4. Chu, Angus C. & Pan, Shiyuan & Sun, Minjuan, 2012. "When does elastic labor supply cause an inverted-U effect of patents on innovation?," Economics Letters, Elsevier, vol. 117(1), pages 211-213.
    5. Lin, Hwan C., 2013. "Optimal Patent Life in a Variety-Expansion Growth Model," MPRA Paper 49790, University Library of Munich, Germany.
    6. Tatsuro Iwaisako & Kazuyoshi Ohki, 2015. "Innovation by Heterogeneous Leaders," Discussion Papers in Economics and Business 15-30, Osaka University, Graduate School of Economics and Osaka School of International Public Policy (OSIPP).
    7. Angus C. Chu & Yuichi Furukawa, 2013. "Patentability and Knowledge Spillovers of Basic R&D," Southern Economic Journal, Southern Economic Association, vol. 79(4), pages 928-945, April.
    8. Guido Cozzi & Silvia Galli, 2014. "Sequential R&D and blocking patents in the dynamics of growth," Journal of Economic Growth, Springer, vol. 19(2), pages 183-219, June.
    9. Angus Chu & Guido Cozzi & Yuichi Furukawa, 2015. "Effects of Economic Development in China on Skill-Biased Technical Change in the US," Review of Economic Dynamics, Elsevier for the Society for Economic Dynamics, vol. 18(2), pages 227-242, April.
    10. Niwa, Sumiko, 2016. "Patent claims and economic growth," Economic Modelling, Elsevier, vol. 54(C), pages 377-381.
    11. Anton Bondarev, 2016. "Intensity of R&D competition and the generation of innovations in heterogeneous setting," Journal of Evolutionary Economics, Springer, vol. 26(3), pages 621-653, July.
    12. Ohki, Kazuyoshi, 2015. "Analysis of transition dynamics caused by technological breakthroughs: Cause of productivity slowdown and drop in existing firms’ stock prices," Structural Change and Economic Dynamics, Elsevier, vol. 35(C), pages 12-25.
    13. Bondarev, Anton, 2018. "Heterogeneous R&D spillovers and sustainable growth: Limits to efficient regulation," Working papers 2018/04, Faculty of Business and Economics - University of Basel.
    14. Shiyuan Pan & Tailong Li & Heng-fu Zou, 2012. "Patent Protection, Technological Change and Wage Inequality: Theory," CEMA Working Papers 537, China Economics and Management Academy, Central University of Finance and Economics.
    15. Chu, Angus C. & Lai, Ching-Chong & Liao, Chih-Hsing, 2010. "A tale of two growth engines: The interactive effects of monetary policy and intellectual property rights," MPRA Paper 30105, University Library of Munich, Germany, revised Apr 2011.
    16. Saito, Yuki, 2017. "Effects of patent protection on economic growth and welfare in a two-R&D-sector economy," Economic Modelling, Elsevier, vol. 62(C), pages 124-129.
    17. Chu, Angus C. & Furukawa, Yuichi, 2011. "On the optimal mix of patent instruments," Journal of Economic Dynamics and Control, Elsevier, vol. 35(11), pages 1964-1975.
    18. Guido Cozzi & Silvia Galli, 2009. "Upstream Innovation Protection: Common Law Evolution and the Dynamics of Wage Inequality," Working Papers 2009_20, Business School - Economics, University of Glasgow.
    19. Bondarev, Anton & Greiner, Alfred, 2017. "Endogenous growth and structural change through vertical and horizontal innovations," Working papers 2017/05, Faculty of Business and Economics - University of Basel.
    20. Furukawa, Yuichi, 2013. "The struggle to survive in the R&D sector: Implications for innovation and growth," Economics Letters, Elsevier, vol. 121(1), pages 26-29.
    21. Gilad Sorek, 2017. "Market Power and Growth through Vertical and Horizontal Competition," Auburn Economics Working Paper Series auwp2017-01, Department of Economics, Auburn University.
    22. Yuichi Furukawa, 2015. "Leapfrogging cycles in international competition," Economic Theory, Springer;Society for the Advancement of Economic Theory (SAET), vol. 59(2), pages 401-433, June.
    23. repec:red:issued:17-109 is not listed on IDEAS
    24. Yibai Yang, 2018. "On the Optimality of IPR Protection with Blocking Patents," Review of Economic Dynamics, Elsevier for the Society for Economic Dynamics, vol. 27, pages 205-230, January.
    25. Angus Chu & Guido Cozzi, 2018. "Effects of Patents versus R&D subsidies on Income Inequality"," Review of Economic Dynamics, Elsevier for the Society for Economic Dynamics, vol. 29, pages 68-84, July.

    More about this item

    Keywords

    economic growth; R&D; uniform patent protection; time-consistent patent policy;

    JEL classification:

    • O34 - Economic Development, Innovation, Technological Change, and Growth - - Innovation; Research and Development; Technological Change; Intellectual Property Rights - - - Intellectual Property and Intellectual Capital
    • O31 - Economic Development, Innovation, Technological Change, and Growth - - Innovation; Research and Development; Technological Change; Intellectual Property Rights - - - Innovation and Invention: Processes and Incentives
    • O40 - Economic Development, Innovation, Technological Change, and Growth - - Economic Growth and Aggregate Productivity - - - General

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