Substitutability and Competition in the Dixit-Stiglitz Model
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 a.ect 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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- 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.
- Dixit, Avinash K & Stiglitz, Joseph E, 1975. "Monopolistic Competition and Optimum Product Diversity," The Warwick Economics Research Paper Series (TWERPS) 64, University of Warwick, Department of Economics.
- Piercarlo Zanchettin & Vincenzo Denicolò, 2004. "Competition and Growth in Neo-Schumpeterian Models," Discussion Papers in Economics 04/28, Department of Economics, University of Leicester.
- Chad Syverson, 2004.
"Product Substitutability and Productivity Dispersion,"
The Review of Economics and Statistics,
MIT Press, vol. 86(2), pages 534-550, May.
- Chad Syverson, 2003. "Product Substitutability and Productivity Dispersion," NBER Working Papers 10049, National Bureau of Economic Research, Inc.
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