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Innovation by Entrants and Incumbents

We extend the basic Schumpeterian endogenous growth model by allowing incumbents to undertake innovations to improve their products, while entrants engage in more radical innovations to replace incumbents. Our model provides a tractable framework for the analysis of growth driven by both entry of new firms and productivity improvements by continuing firms. Unlike in the basic Schumpeterian models, subsidies to potential entrants might decrease economic growth because they discourage productivity improvements by incumbents in response to increased entry, which may outweigh the positive effect of greater creative destruction. As the model features entry of new fi.rms and expansion and exit of existing firms, it also generates a nondegenerate equilibrium firm size distribution. We show that, when there is also costly imitation preventing any sector from falling too far below the average, the stationary firm size distribution is Pareto with an exponent approximately equal to one (the socalled .Zipf distribution.).

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Paper provided by Georgetown University, Department of Economics in its series Working Papers with number gueconwpa~10-10-06.

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Date of creation: 06 Jan 2010
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Handle: RePEc:geo:guwopa:gueconwpa~10-10-06
Contact details of provider: Postal: Georgetown University Department of Economics Washington, DC 20057-1036
Phone: 202-687-6074
Fax: 202-687-6102
Web page: http://econ.georgetown.edu/
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Order Information: Postal: Roger Lagunoff Professor of Economics Georgetown University Department of Economics Washington, DC 20057-1036
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  1. Erzo G. J. Luttmer, 2011. "On the Mechanics of Firm Growth," Review of Economic Studies, Oxford University Press, vol. 78(3), pages 1042-1068.
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  11. David Weinstein & Christian Broda, 2004. "Globalization and the Gains from Variety," Econometric Society 2004 North American Summer Meetings 508, Econometric Society.
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  13. Jovanovic, Boyan, 1982. "Selection and the Evolution of Industry," Econometrica, Econometric Society, vol. 50(3), pages 649-70, May.
  14. Esteban Rossi-Hansberg & Mark L. J. Wright, 2007. "Establishment Size Dynamics in the Aggregate Economy," American Economic Review, American Economic Association, vol. 97(5), pages 1639-1666, December.
  15. Melitz, Marc J, 2002. "The Impact of Trade on Intra-Industry Reallocations and Aggregate Industry Productivity," CEPR Discussion Papers 3381, C.E.P.R. Discussion Papers.
  16. Lagos, R., 2001. "A Model of TFP," Working Papers 01-08, C.V. Starr Center for Applied Economics, New York University.
  17. Hopenhayn, Hugo A, 1992. "Entry, Exit, and Firm Dynamics in Long Run Equilibrium," Econometrica, Econometric Society, vol. 60(5), pages 1127-50, September.
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  19. Dunne, Timothy & Roberts, Mark J & Samuelson, Larry, 1989. "The Growth and Failure of U.S. Manufacturing Plants," The Quarterly Journal of Economics, MIT Press, vol. 104(4), pages 671-98, November.
  20. Timothy Dunne & Mark J. Roberts & Larry Samuelson, 1988. "Patterns of Firm Entry and Exit in U.S. Manufacturing Industries," RAND Journal of Economics, The RAND Corporation, vol. 19(4), pages 495-515, Winter.
  21. Philippe Aghion & Nicholas Bloom & Richard Blundell & Rachel Griffith & Peter Howitt, 2002. "Competition and Innovation: An Inverted U Relationship," NBER Working Papers 9269, National Bureau of Economic Research, Inc.
  22. Jones, Charles I, 1995. "R&D-Based Models of Economic Growth," Journal of Political Economy, University of Chicago Press, vol. 103(4), pages 759-84, August.
  23. Eric J. Bartelsman & Mark Doms, 2000. "Understanding productivity: lessons from longitudinal microdata," Finance and Economics Discussion Series 2000-19, Board of Governors of the Federal Reserve System (U.S.).
  24. Esteban Rossi-Hansberg & Mark L. J. Wright, 2007. "Urban Structure and Growth," Review of Economic Studies, Oxford University Press, vol. 74(2), pages 597-624.
  25. An, Galina & Iyigun, Murat F., 2004. "The export skill content, learning by exporting and economic growth," Economics Letters, Elsevier, vol. 84(1), pages 29-34, July.
  26. Ben Gardiner & Ron Martin & Tyler Peter, 2004. "Competitiveness, Productivity and Economic Growth across the European Regions," ERSA conference papers ersa04p333, European Regional Science Association.
  27. Erzo G.J. Luttmer, 2010. "Models of firm heterogeneity and growth," Working Papers 678, Federal Reserve Bank of Minneapolis.
  28. Jan Eeckhout & Boyan Jovanovic, 2002. "Knowledge Spillovers and Inequality," American Economic Review, American Economic Association, vol. 92(5), pages 1290-1307, December.
  29. Crespo Jorge & Martín Carmela & Velázquez Francisco J, 2004. "The Role of International Technology Spillovers in the Economic Growth of the OECD Countries," Global Economy Journal, De Gruyter, vol. 4(2), pages 1-20, December.
  30. Ericson, Richard & Pakes, Ariel, 1995. "Markov-Perfect Industry Dynamics: A Framework for Empirical Work," Review of Economic Studies, Wiley Blackwell, vol. 62(1), pages 53-82, January.
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