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A Network Model of Price Dispersion

Author

Listed:
  • Giacomo Pasini

    (Ca' Foscari University in Venice)

  • Paolo Pin

    (Abdus Salam Internazional Centre for Theoretical Physics)

  • Simon Weidenholzer

    (Institut für Volkswirtschaftslehre, Universität Wien)

Abstract

We analyze a model of price competition ? la Bertrand in a network environment. Firms only have a limited information on the structure of network: they know the number of potential customers they can attract and the degree distribution of customers. This incomplete information framework stimulates the use of Bayesian-Nash equilibrium. We find that, if there are customers only linked to one firm, but not all of them are, then an equilibrium in randomized strategies fails to exist. Instead, we find a symmetric equilibrium in randomized strategies. Finally, we test our results on US gasoline data. We find empirical evidence consistent with firms playing random strategies.

Suggested Citation

  • Giacomo Pasini & Paolo Pin & Simon Weidenholzer, 2008. "A Network Model of Price Dispersion," Working Papers 2008.28, Fondazione Eni Enrico Mattei.
  • Handle: RePEc:fem:femwpa:2008.28
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    References listed on IDEAS

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    Cited by:

    1. Saul Lach & José L. Moraga†González, 2017. "Asymmetric Price Effects of Competition," Journal of Industrial Economics, Wiley Blackwell, vol. 65(4), pages 767-803, December.
    2. Zakaria Babutsidze, 2017. "Duopolistic Price Competition with Captives," Metroeconomica, Wiley Blackwell, vol. 68(4), pages 903-926, November.
    3. Aoyagi, Masaki, 2018. "Bertrand competition under network externalities," Journal of Economic Theory, Elsevier, vol. 178(C), pages 517-550.
    4. Sneha Bakshi, 0. "Limits of price competition: cost asymmetry and imperfect information," International Journal of Game Theory, Springer;Game Theory Society, vol. 0, pages 1-20.
    5. Sneha Bakshi, 2020. "Limits of price competition: cost asymmetry and imperfect information," International Journal of Game Theory, Springer;Game Theory Society, vol. 49(4), pages 913-932, December.

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    More about this item

    Keywords

    Bertrand Competition; Bayesian- Nash Equilibrium; Mobility Index;
    All these keywords.

    JEL classification:

    • D43 - Microeconomics - - Market Structure, Pricing, and Design - - - Oligopoly and Other Forms of Market Imperfection
    • D85 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Network Formation
    • L11 - Industrial Organization - - Market Structure, Firm Strategy, and Market Performance - - - Production, Pricing, and Market Structure; Size Distribution of Firms

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