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Mixed Oligopoly and Entry


  • John Bennett


  • Manfredi La manna



We analyze a mixed oligopoly with free entry by private firms. It is assumed that a state-owned enterprise (SOE) maximizes an increasing function of output, subject to a break-even constraint. We first show that, because of instability, the industry cannot contain more than one SOE. Then we establish an irrelevance result: if the SOE's cost disadvantage relative to private firms is not too large, then aggregate output, aggreagte costs and welfare are the same with and without the SOE. However, for this range of cost disadvantage an SOE monopoly yields higher welfare. Implications for privatization policy are suggested.

Suggested Citation

  • John Bennett & Manfredi La manna, 2012. "Mixed Oligopoly and Entry," CEDI Discussion Paper Series 12-01, Centre for Economic Development and Institutions(CEDI), Brunel University.
  • Handle: RePEc:edb:cedidp:12-01

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    References listed on IDEAS

    1. De Donder, Philippe & Roemer, John E., 2009. "Mixed oligopoly equilibria when firms' objectives are endogenous," International Journal of Industrial Organization, Elsevier, vol. 27(3), pages 414-423, May.
    2. Yoshihiro Tomaru & Yasuhiko Nakamura & Masayuki Saito, 2011. "Strategic Managerial Delegation In A Mixed Duopoly With Capacity Choice: Partial Delegation Or Full Delegation," Manchester School, University of Manchester, vol. 79(4), pages 811-838, July.
    3. Estrin, Saul & de Meza, David, 1995. "Unnatural monopoly," Journal of Public Economics, Elsevier, vol. 57(3), pages 471-488, July.
    4. Matsumura, Toshihiro, 1998. "Partial privatization in mixed duopoly," Journal of Public Economics, Elsevier, vol. 70(3), pages 473-483, December.
    5. de Fraja, Giovanni & Delbono, Flavio, 1990. " Game Theoretic Models of Mixed Oligopoly," Journal of Economic Surveys, Wiley Blackwell, vol. 4(1), pages 1-17.
    6. Massimo Florio, 2014. "The return of public enterprise," Working Papers 201401, CSIL Centre for Industrial Studies.
    7. Xavier Vives, 2001. "Oligopoly Pricing: Old Ideas and New Tools," MIT Press Books, The MIT Press, edition 1, volume 1, number 026272040x, July.
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    Cited by:

    1. Paolo Castelnovo, 2016. "State-invested enterprises in the European telecommunications industry: Are they competitive players?," ECONOMIA PUBBLICA, FrancoAngeli Editore, vol. 2016(3), pages 219-240.
    2. Bennett, John & La Manna, Manfredi, 2012. "Mixed oligopoly, public firm behavior, and free private entry," Economics Letters, Elsevier, vol. 117(3), pages 767-769.

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