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El número óptimo de empresas bajo competencia de Bertrand

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  • Germán Coloma

Abstract

Este trabajo es acerca de un modelo de competencia en precios en el mercado de un producto homogéneo con libre entrada de empresas idénticas y rendimientos variables a escala. Si el número óptimo de empresas activas en el mercado es dos o más, el equilibrio de Bertrand existe siempre para dicho número óptimo, y no existe si el número de empresas activas es menor que el óptimo. El modelo, sin embargo, no descarta la existencia de equilibrios con más empresas activas que el óptimo. Finalmente, si el número óptimo de empresas es igual a uno, entonces el equilibrio de Bertrand no existe.

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Bibliographic Info

Paper provided by Universidad del CEMA in its series CEMA Working Papers: Serie Documentos de Trabajo. with number 397.

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Length: 17 pages
Date of creation: May 2009
Date of revision:
Handle: RePEc:cem:doctra:397

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Keywords: Equilibrio de Bertrand; rendimientos variables; libre entrada;

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  1. Sharkey, William W. & Sibley, David S., 1993. "A Bertrand model of pricing and entry," Economics Letters, Elsevier, vol. 41(2), pages 199-206.
  2. Rodolphe Dos Santos Ferreira & Frédéric Dufourt, 2007. "Free entry equilibria with positive profits: A unified approach to quantity and price competition games," International Journal of Economic Theory, The International Society for Economic Theory, vol. 3(2), pages 75-94.
  3. Dastidar, Krishnendu Ghosh, 1995. "On the Existence of Pure Strategy Bertrand Equilibrium," Economic Theory, Springer, vol. 5(1), pages 19-32, January.
  4. Steffen Hoernig, 2007. "Bertrand Games and Sharing Rules," Economic Theory, Springer, vol. 31(3), pages 573-585, June.
  5. ANDERSON, Simon P. & DE PALMA, André & NESTEROV, Yurii, 1994. "Oligopolistic Competition and the Optimal Provision of Products," CORE Discussion Papers 1994034, Université catholique de Louvain, Center for Operations Research and Econometrics (CORE).
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  7. Prabal Roy Chowdhury, 2002. "Limit-pricing as Bertrand equilibrium," Economic Theory, Springer, vol. 19(4), pages 811-822.
  8. Novshek, William & Chowdhury, Prabal Roy, 2003. "Bertrand equilibria with entry: limit results," International Journal of Industrial Organization, Elsevier, vol. 21(6), pages 795-808, June.
  9. Vettas, Nikolaos, 2000. "On entry, exit, and coordination with mixed strategies," European Economic Review, Elsevier, vol. 44(8), pages 1557-1576, August.
  10. Corchon, Luis C. & Fradera, Isabel, 2002. "Comparative statics in Cournot free entry equilibrium," Mathematical Social Sciences, Elsevier, vol. 44(2), pages 155-168, November.
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  12. Saporiti Alejandro & Coloma Germán, 2010. "Bertrand Competition in Markets with Fixed Costs," The B.E. Journal of Theoretical Economics, De Gruyter, vol. 10(1), pages 1-30, June.
  13. Makoto Yano, 2006. "A price competition game under free entry," Economic Theory, Springer, vol. 29(2), pages 395-414, October.
  14. Brander, James A & Spencer, Barbara J, 1985. "Tacit Collusion, Free Entry, and Welfare," Journal of Industrial Economics, Wiley Blackwell, vol. 33(3), pages 277-94, March.
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