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A Schumpeterian Growth Model with Heterogenous Firms

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  • A. Minniti
  • C.P. Parello
  • P.S. 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: (i) the innovation size is far from being identical across industries; and (ii) 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 set-up 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.

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Paper provided by Dipartimento Scienze Economiche, Universita' di Bologna in its series Working Papers with number 645.

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Date of creation: Oct 2008
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Handle: RePEc:bol:bodewp:645

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  1. Dietmar Harhoff & Frederic M. Scherer & Katrin Vopel, 1997. "Exploring the Tail of Patented Invention Value Distributions," CIG Working Papers FS IV 97-27, Wissenschaftszentrum Berlin (WZB), Research Unit: Competition and Innovation (CIG).
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Cited by:
  1. Cevikarslan, Salih, 2013. "Optimal patent length and patent breadth in an R&D driven market with evolving consumer preferences: An evolutionary multi-agent based modelling approach," MERIT Working Papers 020, United Nations University - Maastricht Economic and Social Research Institute on Innovation and Technology (MERIT).
  2. Paolo E. Giordani & Luca Zamparelli, 2009. "On Robust Asymmetric Equilibria in Asymmetric R&D-Driven Growth Economies," Working Papers CELEG 0903, Dipartimento di Economia e Finanza, LUISS Guido Carli.
  3. Piercarlo Zanchettin & Vincenzo Denicolò, 2009. "Leadership Cycles," Discussion Papers in Economics 09/25, Department of Economics, University of Leicester.
  4. Stadler, Manfred, 2012. "Engines of growth: Education and innovation," University of Tuebingen Working Papers in Economics and Finance 40, University of Tuebingen, Faculty of Economics and Social Sciences.
  5. Francesco Venturini, 2011. "Looking into the black box of Schumpeterian Growth Theories: an empirical assessment of R&D races," Quaderni del Dipartimento di Economia, Finanza e Statistica 94/2011, Università di Perugia, Dipartimento Economia, Finanza e Statistica.
  6. Cevikarslan, Salih, 2013. "Heterogeneity in innovation strategies, evolving consumer preferences and market structure: An evolutionary multi-agent based modelling approach," MERIT Working Papers 019, United Nations University - Maastricht Economic and Social Research Institute on Innovation and Technology (MERIT).
  7. Simon Wiederhold, 2009. "Government Spending Composition in a Simple Model of Schumpeterian Growth," Jena Economic Research Papers 2009-101, Friedrich-Schiller-University Jena, Max-Planck-Institute of Economics.
  8. Viktor Slavtchev & Simon Wiederhold, 2011. "The Impact of Government Procurement Composition on Private R&D Activities," Jena Economic Research Papers 2011-036, Friedrich-Schiller-University Jena, Max-Planck-Institute of Economics.
  9. Simon Wiederhold, 2012. "The Role of Public Procurement in Innovation: Theory and Empirical Evidence," ifo Beiträge zur Wirtschaftsforschung, Ifo Institute for Economic Research at the University of Munich, number 43.

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