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Aggregate Oligopoly Games with Entry

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  • Anderson, Simon
  • Piccinin, Daniel
  • Erkal, Nisvan

Abstract

We use cumulative reaction functions to compare long-run market structures in aggregative oligopoly games. We first compile an IO toolkit for aggregative games. We show strong neutrality properties across market structures. The aggregator stays the same, despite changes in the number of firms and their actions. The IIA property of demands (CES and logit) implies that consumer surplus depends on the aggregator alone, and that the Bertrand pricing game is aggregative. We link together the following results: merging parties' profits fall but consumer surplus is unchanged, Stackelberg leadership raises welfare, monopolistic competition is the market structure with the highest surplus.

Suggested Citation

  • Anderson, Simon & Piccinin, Daniel & Erkal, Nisvan, 2013. "Aggregate Oligopoly Games with Entry," CEPR Discussion Papers 9511, C.E.P.R. Discussion Papers.
    • Handle: RePEc:cpr:ceprdp:9511
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    3. Simon P. Anderson & Bruno Jullien, 2015. "The advertising-financed business model in two-sided media markets," Post-Print hal-02866192, HAL.
    4. Anderson, Simon P. & Peitz, Martin, 2015. "Media see-saws : winners and losers on media platforms," Working Papers 15-16, University of Mannheim, Department of Economics.
    5. Volker Nocke & Nicolas Schutz, 2018. "Multiproduct‐Firm Oligopoly: An Aggregative Games Approach," Econometrica, Econometric Society, vol. 86(2), pages 523-557, March.
    6. Motta, Massimo & Tarantino, Emanuele, 2021. "The effect of horizontal mergers, when firms compete in prices and investments," International Journal of Industrial Organization, Elsevier, vol. 78(C).
    7. Cellini, Roberto & Lambertini, Luca & Ottaviano, Gianmarco I.P., 2020. "Strategic inattention, delegation and endogenous market structure," European Economic Review, Elsevier, vol. 121(C).
    8. Nocke, Volker & Schutz, Nicolas, 2018. "An Aggregative Games Approach to Merger Analysis in Multiproduct-Firm Oligopoly," CEPR Discussion Papers 12905, C.E.P.R. Discussion Papers.
    9. Parenti, Mathieu, 2018. "Large and small firms in a global market: David vs. Goliath," Journal of International Economics, Elsevier, vol. 110(C), pages 103-118.
    10. Sergey Kokovin & Alina Ozhegova & Shamil Sharapudinov & Alexander Tarasov & Philip Ushchev, 2024. "A Theory of Monopolistic Competition with Horizontally Heterogeneous Consumers," American Economic Journal: Microeconomics, American Economic Association, vol. 16(2), pages 354-384, May.
    11. R. Cellini & L. Lambertini & G. I. P. Ottaviano, 2015. "To Know or Not To Know: Strategic Inattention and Endogenous Market Structure," Working Papers wp987, Dipartimento Scienze Economiche, Universita' di Bologna.
    12. Gil-Moltó, Maria José & Poyago-Theotoky, Joanna & Rodrigues-Neto, José A. & Zikos, Vasileios, 2020. "Mixed oligopoly, cost-reducing research and development, and privatisation," European Journal of Operational Research, Elsevier, vol. 283(3), pages 1094-1106.

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    More about this item

    Keywords

    Aggregative games; Oligopoly theory; Entry; Strategic substitutes and complements; Iia property; Mergers; Leadership; Contests; Monopolistic competition; Logit/ces;
    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

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