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Competition Among the Big and the Small

  • Ken-Ichi Shimomura

    (Research Institute for Economics & Business Administration (RIEB), Kobe University, Japan)

  • Jacques-François Thisse

    (CORE, Université catholique de Louvain (Belgium), CREA, Université du Luxembourg (Luxembourg) and CEPR (UK))

Many industries are made of a few big firms, which are able to manipulate the market outcome, and of a host of small businesses, each of which has a negligible impact on the market. We provide a general equilibrium framework that encapsulates both market structures. Due to the higher toughness of competition, the entry of big firms leads them to sell more through a market expansion effect generated by the shrinking of the monopolistically competitive fringe. Furthermore, social welfare increases with the number of big firms because the pro-competitive effect associated with entry dominates the resulting decrease in product diversity.

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Paper provided by Research Institute for Economics & Business Administration, Kobe University in its series Discussion Paper Series with number DP2012-03.

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Length: 28 pages
Date of creation: Feb 2012
Date of revision:
Handle: RePEc:kob:dpaper:dp2012-03
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  1. Emek Basker, 2006. "The Causes and Consequences of Wal-Mart's Growth," Working Papers 0611, Department of Economics, University of Missouri.
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  7. John Roberts & Hugo Sonnenschein, 1976. "On the Foundations of the Theory of Monopolistic Competition," Discussion Papers 169, Northwestern University, Center for Mathematical Studies in Economics and Management Science.
  8. Marianne Bertrand & Francis Kramarz, 2001. "Does Entry Regulation Hinder Job Creation ? Evidence from the French Retail Industry," Working Papers 2001-12, Centre de Recherche en Economie et Statistique.
  9. d'Aspremont, Claude & Dos Santos Ferreira, Rodolphe & Gerard-Varet, Louis-Andre, 1996. "On the Dixit-Stiglitz Model of Monopolistic Competition," American Economic Review, American Economic Association, vol. 86(3), pages 623-29, June.
  10. Kiminori Matsuyama, 1995. "Complementarities and Cumulative Processes in Models of Monopolistic Competition," Journal of Economic Literature, American Economic Association, vol. 33(2), pages 701-729, June.
  11. Victor Ginsburgh & Michiel Keyzer, 1997. "The structure of applied general equilibrium models," ULB Institutional Repository 2013/1653, ULB -- Universite Libre de Bruxelles.
  12. Gabszewicz, Jean J. & Shitovitz, Benyamin, 1992. "The core in imperfectly competitive economies," Handbook of Game Theory with Economic Applications, in: R.J. Aumann & S. Hart (ed.), Handbook of Game Theory with Economic Applications, edition 1, volume 1, chapter 15, pages 459-483 Elsevier.
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  23. André van Stel & Roy Thurik & Sander Wennekers & Martin Carree, 2010. "The relationship between entrepreneurship and economic development: is it U-shaped?," Scales Research Reports H200824, EIM Business and Policy Research.
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  25. Michael Spence, 1976. "Product Selection, Fixed Costs, and Monopolistic Competition," Review of Economic Studies, Oxford University Press, vol. 43(2), pages 217-235.
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