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A Schumpeterian growth model with random quality improvements

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  • Antonio Minniti
  • Carmelo Parello
  • Paul Segerstrom

Abstract

A common assumption in the Schumpeterian growth literature is that the innovation size is constant and identical across industries. This is in contrast with the empirical evidence which shows that: (1) innovation size is not identical across industries and (2) the size distribution of profit returns from innovation is highly skewed toward the low value side, with a long tail on the high value side. In the present paper, we develop a Schumpeterian growth model that is consistent with this evidence. In particular, we assume that when a firm innovates, the size of its quality improvement is the result of a random draw from a Pareto distribution. This enables us to extend the class of quality-ladder growth models to encompass firm heterogeneity. We study the policy implications of this new setup numerically and find that it is optimal to heavily subsidize R&D for plausible parameter values. Although it is optimal to tax R&D for some parameter values, this case only occurs when the steady-state rate of economic growth is very low. Copyright Springer-Verlag 2013

Suggested Citation

  • Antonio Minniti & Carmelo Parello & Paul Segerstrom, 2013. "A Schumpeterian growth model with random quality improvements," Economic Theory, Springer;Society for the Advancement of Economic Theory (SAET), vol. 52(2), pages 755-791, March.
    • Handle: RePEc:spr:joecth:v:52:y:2013:i:2:p:755-791
    DOI: 10.1007/s00199-011-0664-0
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    Cited by:

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    2. Viktor Slavtchev & Simon Wiederhold, 2012. "Technological Intensity of Government Demand and Innovation," ifo Working Paper Series 135, ifo Institute - Leibniz Institute for Economic Research at the University of Munich.
    3. Angus C. Chu & Guido Cozzi & Haichao Fang & Yuichi Furukawa & Chih-Hsing Liao, 2019. "Innovation and Inequality in a Monetary Schumpeterian Model with Heterogeneous Households and Firms," Review of Economic Dynamics, Elsevier for the Society for Economic Dynamics, vol. 34, pages 141-164, October.
    4. Tatsuro Iwaisako & Kazuyoshi Ohki, 2019. "Innovation by Heterogeneous Leaders," Scandinavian Journal of Economics, Wiley Blackwell, vol. 121(4), pages 1673-1704, October.
    5. Edwin Lai, 2013. "Cumulative Innovation, Growth and Welfare-Improving Patent Policy," 2013 Meeting Papers 854, Society for Economic Dynamics.
    6. Cevikarslan S., 2015. "Research joint ventures in an R&D driven market with evolving consumer preferences: An evolutionary multi-agent based modelling approach," MERIT Working Papers 2015-007, United Nations University - Maastricht Economic and Social Research Institute on Innovation and Technology (MERIT).
    7. Angus C. Chu & Yuichi Furukawa & Sushanta Mallick & Pietro Peretto & Xilin Wang, 2021. "Dynamic effects of patent policy on innovation and inequality in a Schumpeterian economy," Economic Theory, Springer;Society for the Advancement of Economic Theory (SAET), vol. 71(4), pages 1429-1465, June.
    8. Keiichi Kishi, 2014. "A patentability requirement and industries targeted by R&D," Discussion Papers in Economics and Business 14-27-Rev., Osaka University, Graduate School of Economics, revised Oct 2014.
    9. Fukuda, Katsufumi, 2019. "Effects of trade liberalization on growth and welfare through basic and applied researches," Journal of Macroeconomics, Elsevier, vol. 62(C).
    10. Chu, Angus C. & Cozzi, Guido & Furukawa, Yuichi & Liao, Chih-Hsing, 2017. "Inflation and economic growth in a Schumpeterian model with endogenous entry of heterogeneous firms," European Economic Review, Elsevier, vol. 98(C), pages 392-409.
    11. Colin Davis & Laixun Zhao, 2022. "Innovation to Keep or to Sell and Tax Incentives," Discussion Paper Series DP2022-28, Research Institute for Economics & Business Administration, Kobe University, revised Nov 2022.
    12. Klein, Michael A., 2022. "The reward and contract theories of patents in a model of endogenous growth," European Economic Review, Elsevier, vol. 147(C).
    13. Michael Klein & Fuat Sener, 2023. "Product Innovation, Diffusion and Endogenous Growth," Review of Economic Dynamics, Elsevier for the Society for Economic Dynamics, vol. 48, pages 178-201, April.
    14. Prettner, Klaus & Werner, Katharina, 2016. "Why it pays off to pay us well: The impact of basic research on economic growth and welfare," Research Policy, Elsevier, vol. 45(5), pages 1075-1090.
    15. Angus C. Chu, 2022. "Inflation, innovation, and growth: A survey," Bulletin of Economic Research, Wiley Blackwell, vol. 74(3), pages 863-878, July.
    16. Ohki, Kazuyoshi, 2023. "Disruptive innovation by heterogeneous incumbents and economic growth: When do incumbents switch to new technology?," Journal of Mathematical Economics, Elsevier, vol. 107(C).
    17. Klein, Michael A., 2020. "Secrecy, the patent puzzle and endogenous growth," European Economic Review, Elsevier, vol. 126(C).
    18. You-Xun Lu & Ching-Chong Lai & Po-Yang Yu, 2024. "Effects of patent policy on growth and inequality: exogenous versus endogenous quality improvements," Journal of Economics, Springer, vol. 141(1), pages 1-28, January.
    19. Angus C. Chu & Guido Cozzi & Haichao Fang & Yuichi Furukawa & Chih-Hsing Liao, 2019. "Innovation and Inequality in a Monetary Schumpeterian Model with Heterogeneous Households and Firms," Review of Economic Dynamics, Elsevier for the Society for Economic Dynamics, vol. 34, pages 141-164, October.
    20. Michael Klein & Fuat Sener, 2023. "Product Innovation, Diffusion and Endogenous Growth," Review of Economic Dynamics, Elsevier for the Society for Economic Dynamics, vol. 48, pages 178-201, April.
    21. Lu, You-Xun & Lai, Ching-Chong, 2021. "Effects of patent policy on growth and inequality: A perspective of exogenous and endogenous quality improvements," MPRA Paper 111183, University Library of Munich, Germany.
    22. Stadler, Manfred, 2013. "Scientific breakthroughs, innovation clusters and stochastic growth cycles," University of Tübingen Working Papers in Business and Economics 60, University of Tuebingen, Faculty of Economics and Social Sciences, School of Business and Economics.

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    More about this item

    Keywords

    Schumpeterian growth; Heterogenous firms; R&D; Optimal policy; E10; L16; O31; O38;
    All these keywords.

    JEL classification:

    • E10 - Macroeconomics and Monetary Economics - - General Aggregative Models - - - General
    • L16 - Industrial Organization - - Market Structure, Firm Strategy, and Market Performance - - - Industrial Organization and Macroeconomics; Macroeconomic Industrial Structure
    • O31 - Economic Development, Innovation, Technological Change, and Growth - - Innovation; Research and Development; Technological Change; Intellectual Property Rights - - - Innovation and Invention: Processes and Incentives
    • O38 - Economic Development, Innovation, Technological Change, and Growth - - Innovation; Research and Development; Technological Change; Intellectual Property Rights - - - Government Policy

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