A note on the excess entry theorem in spatial models with elastic demand
This paper revisits the excess entry theorem in spatial models according to Vickrey [Vickrey, W.S., 1964. Microstatics. Harcourt, Brace and World, New York] and Salop [Salop, S., 1979. Monopolistic competition with outside goods. Bell Journal of Economics 10, 141-156] while relaxing the assumption of inelastic demand. Using a demand function with a constant demand elasticity, we show that the number of firms that enter a market decreases with the degree of demand elasticity. We find that the excess entry theorem does only hold when the demand elasticity is sufficiently small. Otherwise, there is insufficient entry. In the limiting case of unit elastic demand, the market is monopolized. We broaden our results with a more general transportation cost function.
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- Hart, Oliver D, 1985. "Monopolistic Competition in the Spirit of Chamberlin: Special Results," Economic Journal, Royal Economic Society, vol. 95(380), pages 889-908, December.
- Pettengill, John S, 1979. "Monopolistic Competition and Optimum Product Diversity: Comment," American Economic Review, American Economic Association, vol. 69(5), pages 957-960, December.
- Rath, Kali P. & Zhao, Gongyun, 2001. "Two stage equilibrium and product choice with elastic demand," International Journal of Industrial Organization, Elsevier, vol. 19(9), pages 1441-1455, November.
- 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.
- Anderson, Simon P. & de Palma, Andre, 2000. "From local to global competition," European Economic Review, Elsevier, vol. 44(3), pages 423-448, March.
- Anderson, Simon P & de Palma, André, 1996. "From Local to Global Competition," CEPR Discussion Papers 1328, C.E.P.R. Discussion Papers.
- Simon P. Anderson & Andre de Palma, 1998. "From Local to Global Competition," Virginia Economics Online Papers 344, University of Virginia, Department of Economics.
- S. P. Anderson & A. de Palma, 1997. "From local to global competition," THEMA Working Papers 97-10, THEMA (THéorie Economique, Modélisation et Applications), Université de Cergy-Pontoise.
- Steven C. Salop, 1979. "Monopolistic Competition with Outside Goods," Bell Journal of Economics, The RAND Corporation, vol. 10(1), pages 141-156, Spring.
- Matsumura, Toshihiro & Okamura, Makoto, 2006. "A note on the excess entry theorem in spatial markets," International Journal of Industrial Organization, Elsevier, vol. 24(5), pages 1071-1076, September.
- Oliver D. Hart, 1985. "Monopolistic Competition in the Spirit of Chamberlin: A General Model," Review of Economic Studies, Oxford University Press, vol. 52(4), pages 529-546.
- Shin-Kun Peng & Takatoshi Tabuchi, 2007. "Spatial Competition in Variety and Number of Stores," Journal of Economics & Management Strategy, Wiley Blackwell, vol. 16(1), pages 227-250, 03.
- Shin-Kun Peng & Takatoshi Tabuchi, 2005. "Spatial Competition in Variety and Number of Stores," CIRJE F-Series CIRJE-F-360, CIRJE, Faculty of Economics, University of Tokyo.
- Shin-Kun Peng & Takatoshi Tabuchi, 2006. "Spatial Competition in Variety and Number of Stores," IEAS Working Paper : academic research 06-A002, Institute of Economics, Academia Sinica, Taipei, Taiwan.
- Shin-Kun Peng & Takatoshi Tabuchi, 2007. "Erratum: Spatial Competition in Variety and Number of Stores," Journal of Economics & Management Strategy, Wiley Blackwell, vol. 16(2), pages 537-537, 06.
- Martin Peitz, 2002. "Price equilibrium in address models of product differentiation: unit-elastic demand," Economic Theory, Springer;Society for the Advancement of Economic Theory (SAET), vol. 20(4), pages 849-860.
- Michael Sattinger, 1984. "Value of an Additional Firm in Monopolistic Competition," Review of Economic Studies, Oxford University Press, vol. 51(2), pages 321-332.
- Toshihiro Matsumura, 2000. "Entry regulation and social welfare with an integer problem," Journal of Economics, Springer, vol. 71(1), pages 47-58, February.
- Jonathan H Hamilton & James F. Klein & Eytan Sheshinski & Steven M. Slutsky, 1994. "Quantity Competition in a Spatial Model," Canadian Journal of Economics, Canadian Economics Association, vol. 27(4), pages 903-917, November.
- Matsumura, Toshihiro & Okamura, Makoto, 2006. "Equilibrium number of firms and economic welfare in a spatial price discrimination model," Economics Letters, Elsevier, vol. 90(3), pages 396-401, March.
- Lancaster, Kelvin, 1975. "Socially Optimal Product Differentiation," American Economic Review, American Economic Association, vol. 65(4), pages 567-585, September. Full references (including those not matched with items on IDEAS)
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