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Third-degree price discrimination versus uniform pricing

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  • Bergemann, Dirk
  • Castro, Francisco
  • Weintraub, Gabriel

Abstract

We compare the profit of the optimal third-degree price discrimination policy against a uniform pricing policy. A uniform pricing policy offers the same price to all segments of the market. Our main result establishes that for a broad class of third-degree price discrimination problems with concave profit functions (in the price space) and common support, a uniform price is guaranteed to achieve one half of the optimal monopoly profits. This profit bound holds for any number of segments and prices that the seller might use under third-degree price discrimination. We establish that these conditions are tight and that weakening either common support or concavity can lead to arbitrarily poor profit comparisons even for regular or monotone hazard rate distributions.

Suggested Citation

  • Bergemann, Dirk & Castro, Francisco & Weintraub, Gabriel, 2022. "Third-degree price discrimination versus uniform pricing," Games and Economic Behavior, Elsevier, vol. 131(C), pages 275-291.
    • Handle: RePEc:eee:gamebe:v:131:y:2022:i:c:p:275-291
    DOI: 10.1016/j.geb.2021.11.008
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    References listed on IDEAS

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    1. 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.
    2. 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.
    3. Bergemann, Dirk & Castro, Francisco & Weintraub, Gabriel Y., 2020. "The scope of sequential screening with ex post participation constraints," Journal of Economic Theory, Elsevier, vol. 188(C).
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    Cited by:

    1. Irfan Tekdir, 2024. "Third Degree Price Discrimination Under Costly Information Acquisition," Papers 2406.06026, arXiv.org.
    2. Sun, Xiang & Xu, Jin & Zhou, Junjie, 2023. "Effort discrimination and curvature of contest technology in conflict networks," Games and Economic Behavior, Elsevier, vol. 142(C), pages 978-991.

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    More about this item

    Keywords

    Third-degree price discrimination; Uniform price; Approximation; Concave profit function; Market segmentation;
    All these keywords.

    JEL classification:

    • C72 - Mathematical and Quantitative Methods - - Game Theory and Bargaining Theory - - - Noncooperative Games
    • D82 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Asymmetric and Private Information; Mechanism Design
    • D83 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Search; Learning; Information and Knowledge; Communication; Belief; Unawareness

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