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The Welfare Effects of Third-Degree PriceDiscrimination in a Differentiated Oligopoly

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  • Takanori Adachi

    ()
    (School of Economics, Nagoya University)

  • Noriaki Matsushima

    ()
    (Institute of Social and Economic Research, Osaka University)

Abstract

This paper studies the welfare effects of third-degree price discrimination under oligopolistic competition with horizontal product differentiation. We derive a necessary and sufficient condition for price discrimination to improve social welfare: the degree of substitution must be sufficiently greater in the "strong" market (where the discriminatory price is higher than the uniform price) than in the "weak" market (where it is lower). It is verified, however, that consumer surplus is never improved; social welfare improves solely due to an increase in the firms' profits.

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Bibliographic Info

Paper provided by Kyoto University, Institute of Economic Research in its series KIER Working Papers with number 800.

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Date of creation: Dec 2011
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Handle: RePEc:kyo:wpaper:800

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Keywords: Third-degree price discrimination; Oligopoly; Social welfare; Horizontal product differentiation; Substitutability; Complementarity;

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  1. Simon Cowan, 2007. "The welfare effects of third-degree price discrimination with non-linear demand functions," Economics Series Working Papers 364, University of Oxford, Department of Economics.
  2. Jerry A. Hausman & Jeffrey K. MacKie-Mason, 1988. "Price Discrimination and Patent Policy," RAND Journal of Economics, The RAND Corporation, vol. 19(2), pages 253-265, Summer.
  3. Neven, D. & Phlips, L., 1984. "Discriminating oligopolists and common markets," CORE Discussion Papers 1984022, Université catholique de Louvain, Center for Operations Research and Econometrics (CORE).
  4. Kenneth S. Corts, 1998. "Third-Degree Price Discrimination in Oligopoly: All-Out Competition and Strategic Commitment," RAND Journal of Economics, The RAND Corporation, vol. 29(2), pages 306-323, Summer.
  5. I�aki Aguirre & Simon Cowan & John Vickers, 2010. "Monopoly Price Discrimination and Demand Curvature," American Economic Review, American Economic Association, vol. 100(4), pages 1601-15, September.
  6. Liu Qihong & Serfes Konstantinos, 2011. "Third-Degree Price Discrimination," Journal of Industrial Organization Education, De Gruyter, vol. 5(1), pages 1-23, March.
  7. Adachi, Takanori, 2002. "A Note on 'Third-Degree Price Discrimination with Interdependent Demands.'," Journal of Industrial Economics, Wiley Blackwell, vol. 50(2), pages 235, June.
  8. Asplund, Björn Marcus & Eriksson, Rickard & Strand, Niklas, 2002. "Price Discrimination in Oligopoly: Evidence from Swedish Newspapers," CEPR Discussion Papers 3269, C.E.P.R. Discussion Papers.
  9. Ikeda, Takeshi & Toshimitsu, Tsuyoshi, 2010. "Third-degree price discrimination, quality choice, and welfare," Economics Letters, Elsevier, vol. 106(1), pages 54-56, January.
  10. Schwartz, Marius, 1990. "Third-Degree Price Discrimination and Output: Generalizing a Welfare Result," American Economic Review, American Economic Association, vol. 80(5), pages 1259-62, December.
  11. Layson, Stephen K, 1998. "Third-Degree Price Discrimination with Interdependent Demands," Journal of Industrial Economics, Wiley Blackwell, vol. 46(4), pages 511-24, December.
  12. Xavier Vives, 2001. "Oligopoly Pricing: Old Ideas and New Tools," MIT Press Books, The MIT Press, edition 1, volume 1, number 026272040x, December.
  13. Belleflamme,Paul & Peitz,Martin, 2010. "Industrial Organization," Cambridge Books, Cambridge University Press, number 9780521681599, October.
  14. Igal Hendel & Aviv Nevo, 2013. "Intertemporal Price Discrimination in Storable Goods Markets," American Economic Review, American Economic Association, vol. 103(7), pages 2722-51, December.
  15. Layson, Stephen, 1988. "Third-Degree Price Discrimination, Welfare and Profits: A Geometrical Analysis," American Economic Review, American Economic Association, vol. 78(5), pages 1131-32, December.
  16. Holmes, Thomas J, 1989. "The Effects of Third-Degree Price Discrimination in Oligopoly," American Economic Review, American Economic Association, vol. 79(1), pages 244-50, March.
  17. Krishnendu Ghosh Dastidar, 2006. "On Third-Degree Price Discrimination In Oligopoly," Manchester School, University of Manchester, vol. 74(2), pages 231-249, 03.
  18. Stole, Lars A., 2007. "Price Discrimination and Competition," Handbook of Industrial Organization, Elsevier.
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