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The Tension Between Market Shares and Profit Under Platform Competition

Author

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  • Paul Belleflamme

  • Martin Peitz

  • Eric Toulemonde

Abstract

We introduce asymmetries across platforms in the linear model of competing two-sided platforms with singlehoming on both sides and fully characterize the price equilibrium. We identify market environments in which one platform has a larger market share on both sides while obtaining a lower profit than the other platform. This platform enjoys a competitive advantage on one or both sides. Our finding raises further doubts on using market shares as a measure of market power in platform markets.

Suggested Citation

  • Paul Belleflamme & Martin Peitz & Eric Toulemonde, 2020. "The Tension Between Market Shares and Profit Under Platform Competition," CRC TR 224 Discussion Paper Series crctr224_2021_204v2, University of Bonn and University of Mannheim, Germany.
    • Handle: RePEc:bon:boncrc:crctr224_2021_204v2
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    File URL: https://www.crctr224.de/research/discussion-papers/archive/dp204
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    Cited by:

    1. Zhanhong Cui & Kai Li, 2024. "Two‐sided markets: The influence of market power on information utilization strategy and welfare," Managerial and Decision Economics, John Wiley & Sons, Ltd., vol. 45(1), pages 98-117, January.
    2. Bruno Jullien & Alessandro Pavan & Marc Rysman, 2021. "Two-sided markets, pricing, and network effects," Post-Print hal-03828345, HAL.
    3. Andrew Rhodes & Jidong Zhou & Junjie Zhou, 2025. "Digital Ecosystems and Data Regulation," Working Papers hal-04965491, HAL.
    4. Sato, Susumu, 2021. "Market shares and profits in two-sided markets," Economics Letters, Elsevier, vol. 207(C).
    5. Biancini, Sara & Verdier, Marianne, 2023. "Bank-platform competition in the credit market," International Journal of Industrial Organization, Elsevier, vol. 91(C).
    6. Wang, Xintong & Xue, Jingguo & Hou, Xueliang, 2023. "Barriers analysis to Chinese waste photovoltaic module recycling under the background of "double carbon"," Renewable Energy, Elsevier, vol. 214(C), pages 39-54.
    7. Tremblay, Mark J. & Adachi, Takanori & Sato, Susumu, 2023. "Cournot platform competition with mixed-homing," International Journal of Industrial Organization, Elsevier, vol. 91(C).
    8. Giovannetti, Emanuele & Siciliani, Paolo, 2023. "Platform Competition and Incumbency Advantage under Heterogeneous Lock-in effects," Information Economics and Policy, Elsevier, vol. 63(C).
    9. Brenčič, Vera, 2024. "Terms of use and network size: Evidence from online job boards and CV banks in the U.S," Information Economics and Policy, Elsevier, vol. 67(C).
    10. Jon Frost & Jean-Charles Rochet & Huyn Song Shin & Marianne Verdier, 2025. "Competing digital monies," Working Papers hal-05081338, HAL.
    11. Sara Biancini & Marianne Verdier, 2023. "Bank-platform competition in the credit market," Post-Print hal-04300815, HAL.

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    Keywords

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    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
    • L86 - Industrial Organization - - Industry Studies: Services - - - Information and Internet Services; Computer Software

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