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Substitutability and Competition in the Dixit-Stiglitz Model

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  • Winfried Koeniger
  • Omar Licandro

Abstract

The effects of competition on growth are analyzed in the recent literature by comparing economies with the same market structure but different degrees of substitutability. In this note, we show that in a general equilibrium model with monopolistic competition à la Dixit-Stiglitz the effect of substitutability on the allocation of resources is independent of the associated change in competition. Higher substitutability increases welfare, output and productivity because resources shift towards the most productive sectors. However, since markups are equal across sectors, changes in market power do not affect the relative price of consumption goods, implying that the induced changes in market power do not have any direct effect on equilibrium allocations.

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Paper provided by FEDEA in its series Working Papers with number 2004-06.

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Handle: RePEc:fda:fdaddt:2004-06

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  1. Dixit, Avinash K & Stiglitz, Joseph E, 1977. "Monopolistic Competition and Optimum Product Diversity," American Economic Review, American Economic Association, vol. 67(3), pages 297-308, June.
  2. Chad Syverson, 2003. "Product Substitutability and Productivity Dispersion," NBER Working Papers 10049, National Bureau of Economic Research, Inc.
  3. Piercarlo Zanchettin & Vincenzo Denicolò, 2004. "Competition and Growth in Neo-Schumpeterian Models," Discussion Papers in Economics 04/28, Department of Economics, University of Leicester.
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Cited by:
  1. Simon Sosvilla-Rivero & Pedro Rodriguez, 2010. "Linkages in international stock markets: evidence from a classification procedure," Applied Economics, Taylor & Francis Journals, vol. 42(16), pages 2081-2089.
  2. José A. Herce, . "Could this ever happen in Spain? Economic and policy aspects of a SARS-like episode," Working Papers 2004-09, FEDEA.
  3. Helge Sanner, 2009. "Economy vs. history," The Annals of Regional Science, Springer, vol. 43(2), pages 283-306, June.
  4. Josheski, Dushko & Koteski, Cane & Lazarov, Darko, 2011. "Monopolistic competition: Critical evaluation the theory of monopolistic competition with specific reference to the seminal 1977 paper by Dixit and Stiglitz," MPRA Paper 33802, University Library of Munich, Germany.
  5. Helge Sanner, 2004. "Economy vs. History: What Does Actually Determine the Distribution of Firms' Locations in Cities?," Volkswirtschaftliche Diskussionsbeiträge 67, Universität Potsdam, Wirtschafts- und Sozialwissenschaftliche Fakultät, revised Sep 2004.
  6. Helge Sanner, 2005. "Economy vs History - What Does Actually Determine the Distribution of Shops' Locations in Cities?," ERSA conference papers ersa05p175, European Regional Science Association.
  7. Malte Mosel, 2010. "Competition, Imitation, and R&D Productivity in a Growth Model with Sector-Specific Patent Protection," CESifo Working Paper Series 3109, CESifo Group Munich.

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