IDEAS home Printed from https://ideas.repec.org/p/zbw/dicedp/336.html
   My bibliography  Save this paper

Third-degree price discrimination in oligopoly when markets are covered

Author

Listed:
  • Dertwinkel-Kalt, Markus
  • Wey, Christian

Abstract

We analyze oligopolistic third-degree price discrimination relative to uniform pricing, when markets are always covered. Pricing equilibria are critically determined by supply-side features such as the number of firms and their marginal cost differences. It follows that each firm's Lerner index under uniform pricing is equal to the weighted harmonic mean of the firm's relative margins under discriminatory pricing. Uniform pricing then decreases average prices and raises consumer surplus. We provide an intriguingly simple approach to calculate the consumer surplus gain from uniform pricing only based on market data of the discriminatory equilibrium (prices and quantities).

Suggested Citation

  • Dertwinkel-Kalt, Markus & Wey, Christian, 2020. "Third-degree price discrimination in oligopoly when markets are covered," DICE Discussion Papers 336, Heinrich Heine University Düsseldorf, Düsseldorf Institute for Competition Economics (DICE).
  • Handle: RePEc:zbw:dicedp:336
    as

    Download full text from publisher

    File URL: https://www.econstor.eu/bitstream/10419/216730/1/1696936373.pdf
    Download Restriction: no
    ---><---

    Other versions of this item:

    References listed on IDEAS

    as
    1. Armstrong, Mark & Vickers, John, 2001. "Competitive Price Discrimination," RAND Journal of Economics, The RAND Corporation, vol. 32(4), pages 579-605, Winter.
    2. Yongmin Chen & Marius Schwartz, 2015. "Differential pricing when costs differ: a welfare analysis," RAND Journal of Economics, RAND Corporation, vol. 46(2), pages 442-460, June.
    3. Schmalensee, Richard, 1981. "Output and Welfare Implications of Monopolistic Third-Degree Price Discrimination," American Economic Review, American Economic Association, vol. 71(1), pages 242-247, March.
    4. Simon Cowan, 2016. "Welfare-increasing third-degree price discrimination," RAND Journal of Economics, RAND Corporation, vol. 47(2), pages 326-340, May.
    5. E. Glen Weyl & Michal Fabinger, 2013. "Pass-Through as an Economic Tool: Principles of Incidence under Imperfect Competition," Journal of Political Economy, University of Chicago Press, vol. 121(3), pages 528-583.
    6. Simon Cowan, 2012. "Third-Degree Price Discrimination and Consumer Surplus," Journal of Industrial Economics, Wiley Blackwell, vol. 60(2), pages 333-345, June.
    7. Iñaki Aguirre & Simon Cowan & John Vickers, 2010. "Monopoly Price Discrimination and Demand Curvature," American Economic Review, American Economic Association, vol. 100(4), pages 1601-1615, September.
    8. Schwartz, Marius, 1990. "Third-Degree Price Discrimination and Output: Generalizing a Welfare Result," American Economic Review, American Economic Association, vol. 80(5), pages 1259-1262, December.
    9. Holmes, Thomas J, 1989. "The Effects of Third-Degree Price Discrimination in Oligopoly," American Economic Review, American Economic Association, vol. 79(1), pages 244-250, March.
    10. Varian, Hal R, 1985. "Price Discrimination and Social Welfare," American Economic Review, American Economic Association, vol. 75(4), pages 870-875, September.
    11. Eric T. Anderson & James D. Dana, Jr., 2009. "When Is Price Discrimination Profitable?," Management Science, INFORMS, vol. 55(6), pages 980-989, June.
    Full references (including those not matched with items on IDEAS)

    Most related items

    These are the items that most often cite the same works as this one and are cited by the same works as this one.
    1. Takanori Adachi & Noriaki Matsushima, 2014. "The Welfare Effects Of Third-Degree Price Discrimination In A Differentiated Oligopoly," Economic Inquiry, Western Economic Association International, vol. 52(3), pages 1231-1244, July.
    2. Simon Cowan, 2016. "Welfare-increasing third-degree price discrimination," RAND Journal of Economics, RAND Corporation, vol. 47(2), pages 326-340, May.
    3. Zhu Wang & Julian Wright, 2018. "Should platforms be allowed to charge ad valorem fees?," Journal of Industrial Economics, Wiley Blackwell, vol. 66(3), pages 739-760, September.
    4. Takanori Adachi & Michal Fabinger, 2017. "Multi-Dimensional Pass-Through, Incidence, and the Welfare Burden of Taxation in Oligopoly," CIRJE F-Series CIRJE-F-1040, CIRJE, Faculty of Economics, University of Tokyo.
    5. Aguirre, Iñaki, 2019. "Oligopoly price discrimination, competitive pressure and total output," Economics - The Open-Access, Open-Assessment E-Journal (2007-2020), Kiel Institute for the World Economy (IfW), vol. 13, pages 1-16.
    6. Youping Li, 2017. "Differential Pricing in Intermediate Good Markets," Journal of Industrial Economics, Wiley Blackwell, vol. 65(3), pages 585-596, September.
    7. Tang, Yao & Chen, Rachel R. & Guan, Xu, 2021. "Daily-deal market with consumer retention: Price discrimination or quality differentiation," Omega, Elsevier, vol. 102(C).
    8. Aguirre Iñaki, 2016. "On the Economics of the “Meeting Competition Defense” Under the Robinson–Patman Act," The B.E. Journal of Economic Analysis & Policy, De Gruyter, vol. 16(3), pages 1213-1238, September.
    9. Iñaki Aguirre & Simon G. Cowan, 2015. "Monopoly price discrimination with constant elasticity demand," Economic Theory Bulletin, Springer;Society for the Advancement of Economic Theory (SAET), vol. 3(2), pages 329-340, October.
    10. Jong-Hee Hahn & Chan KIm, 2018. "Input price discrimination with differentiated final products," Working papers 2018rwp-118, Yonsei University, Yonsei Economics Research Institute.
    11. Takanori Adachi & Michal Fabinger, 2017. "Multi-Dimensional Pass-Through and Welfare Measures under Imperfect Competition," Papers 1702.04967, arXiv.org, revised Dec 2018.
    12. Yongmin Chen & Marius Schwartz, 2015. "Differential pricing when costs differ: a welfare analysis," RAND Journal of Economics, RAND Corporation, vol. 46(2), pages 442-460, June.
    13. Takanori Adachi & Muhammad Michal Fabinger, 2017. "Multi-Dimensional Pass-Through, Incidence, and the Welfare Burden of Taxation in Oligopoly," CIRJE F-Series CIRJE-F-1040, CIRJE, Faculty of Economics, University of Tokyo.
    14. Romain Lestage, 2021. "Input price discrimination and non-controlling vertical shareholding," Journal of Regulatory Economics, Springer, vol. 59(3), pages 226-250, June.
    15. Chen, Yongmin & Schwartz, Marius, 2012. "Beyond price discrimination: welfare under differential pricing when costs also differ," MPRA Paper 43393, University Library of Munich, Germany.
    16. Dirk Bergemann & Benjamin Brooks & Stephen Morris, 2015. "The Limits of Price Discrimination," American Economic Review, American Economic Association, vol. 105(3), pages 921-957, March.
    17. E. Glen Weyl & Michal Fabinger, 2013. "Pass-Through as an Economic Tool: Principles of Incidence under Imperfect Competition," Journal of Political Economy, University of Chicago Press, vol. 121(3), pages 528-583.
    18. Tremblay, Mark J., 2019. "Pareto price discrimination," Economics Letters, Elsevier, vol. 183(C), pages 1-1.
    19. Li, Youping, 2013. "Timing of investments and third degree price discrimination in intermediate good markets," Economics Letters, Elsevier, vol. 121(2), pages 316-320.
    20. Yongmin Chen & Jianpei Li & Marius Schwartz, 2021. "Competitive differential pricing," RAND Journal of Economics, RAND Corporation, vol. 52(1), pages 100-124, March.

    More about this item

    Keywords

    Third-Degree Price Discrimination; Uniform Pricing; Harmonic Mean Formula; Covered Demand;
    All these keywords.

    JEL classification:

    • D43 - Microeconomics - - Market Structure, Pricing, and Design - - - Oligopoly and Other Forms of Market Imperfection
    • L13 - Industrial Organization - - Market Structure, Firm Strategy, and Market Performance - - - Oligopoly and Other Imperfect Markets
    • L41 - Industrial Organization - - Antitrust Issues and Policies - - - Monopolization; Horizontal Anticompetitive Practices
    • K21 - Law and Economics - - Regulation and Business Law - - - Antitrust Law

    NEP fields

    This paper has been announced in the following NEP Reports:

    Statistics

    Access and download statistics

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:zbw:dicedp:336. See general information about how to correct material in RePEc.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: . General contact details of provider: https://edirc.repec.org/data/diduede.html .

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    If CitEc recognized a bibliographic reference but did not link an item in RePEc to it, you can help with this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: ZBW - Leibniz Information Centre for Economics (email available below). General contact details of provider: https://edirc.repec.org/data/diduede.html .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service hosted by the Research Division of the Federal Reserve Bank of St. Louis . RePEc uses bibliographic data supplied by the respective publishers.