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Note on the Excess Entry Theorem in the Presence of Network Externalities

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  • Tsuyoshi Toshimitsu

    (School of Economics, Kwansei Gakuin University)

Abstract

We reconsider the excess entry theorem in the presence of network externalities under Cournot oligopoly. We demonstrate that if the strength of a network externality is larger (smaller) than a half, the number of firms under free entry is socially too small (too large), based on the second-best criteria.

Suggested Citation

  • Tsuyoshi Toshimitsu, 2019. "Note on the Excess Entry Theorem in the Presence of Network Externalities," Discussion Paper Series 195, School of Economics, Kwansei Gakuin University.
    • Handle: RePEc:kgu:wpaper:195
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    References listed on IDEAS

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    1. Sjaak Hurkens & Ángel L. López, 2014. "Mobile Termination, Network Externalities and Consumer Expectations," Economic Journal, Royal Economic Society, vol. 124(579), pages 1005-1039, September.
    2. Matsumura, Toshihiro & Okamura, Makoto, 2006. "A note on the excess entry theorem in spatial markets," International Journal of Industrial Organization, Elsevier, vol. 24(5), pages 1071-1076, September.
    3. Koichi Kagitani & Takao Ohkawa & Makoto Okamura, 2016. "Does the Excess Entry Theorem Hold in a Differentiated Oligopoly?," Manchester School, University of Manchester, vol. 84(3), pages 340-362, June.
    4. Kotaro Suzumura, 2012. "Excess Entry Theorems After 25 Years," The Japanese Economic Review, Japanese Economic Association, vol. 63(2), pages 152-170, June.
    5. Katz, Michael L & Shapiro, Carl, 1985. "Network Externalities, Competition, and Compatibility," American Economic Review, American Economic Association, vol. 75(3), pages 424-440, June.
    6. Arijit Mukherjee & Soma Mukherjee, 2008. "Excess‐Entry Theorem: The Implications Of Licensing," Manchester School, University of Manchester, vol. 76(6), pages 675-689, December.
    7. Kotaro Suzumura & Kazuharu Kiyono, 1987. "Entry Barriers and Economic Welfare," The Review of Economic Studies, Review of Economic Studies Ltd, vol. 54(1), pages 157-167.
    8. Steven T. Berry & Joel Waldfogel, 1999. "Free Entry and Social Inefficiency in Radio Broadcasting," RAND Journal of Economics, The RAND Corporation, vol. 30(3), pages 397-420, Autumn.
    9. Economides, Nicholas, 1996. "Network externalities, complementarities, and invitations to enter," European Journal of Political Economy, Elsevier, vol. 12(2), pages 211-233, September.
    10. N. Gregory Mankiw & Michael D. Whinston, 1986. "Free Entry and Social Inefficiency," RAND Journal of Economics, The RAND Corporation, vol. 17(1), pages 48-58, Spring.
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    Cited by:

    1. Oleg Andreev & Cong Phan The & Dmitry Gura & Lesya Bozhko, 2022. "The relationship between online retailing and the regional economy," Economia e Politica Industriale: Journal of Industrial and Business Economics, Springer;Associazione Amici di Economia e Politica Industriale, vol. 49(4), pages 691-711, December.
    2. Qidi Zhang & Leonard F. S. Wang, 2022. "Taxation, Network Externalities, Consumer Suffering, and Profit-Raising Entry: A Cautionary Note," Journal of Industry, Competition and Trade, Springer, vol. 22(2), pages 225-231, June.
    3. Kangsik Choi & DongJoon Lee, 2022. "Network externalities and endogenous timing in managerial firms," Managerial and Decision Economics, John Wiley & Sons, Ltd., vol. 43(5), pages 1462-1475, July.

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    More about this item

    Keywords

    Cournot oligopoly; free entry; excess entry theorem; network externality; a fulfilled equilibrium; passive expectations; responsive expectations;
    All these keywords.

    JEL classification:

    • D21 - Microeconomics - - Production and Organizations - - - Firm Behavior: Theory
    • D43 - Microeconomics - - Market Structure, Pricing, and Design - - - Oligopoly and Other Forms of Market Imperfection
    • D62 - Microeconomics - - Welfare Economics - - - Externalities
    • L15 - Industrial Organization - - Market Structure, Firm Strategy, and Market Performance - - - Information and Product Quality

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