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On some collusive and signaling equilibria in ascending auctions for multiple objects


  • LOVO, Stefano
  • ALBANO, Gian Luigi

    (ELSE and Department of Economics, University College London)

  • GERMANO, Fabrizio

    (Departamento d'Economia i Empresa, Universitat Pompeu Fabra)


We consider two ascending auctions for multiple objects: the SEAMO (simultaneous English auction for multiple objects) and the the JAMO (Japanese auction for multiple objects). We first derive a (competitive) Perfect Bayesian Equilibrium of the JAMO by exploiting the strategic equivalence between the JAMO and the Survival Auction which consists of a finite sequence of sealed-bid auctions. Then, we prove that many of the (unwanted) collusive or signaling equilibria studied in the literature in the framework of the SEAMO do not have a counterpart in the JAMO. However, it is shown that certain collusive equilibria based on retaliatory strategies do exist in both auctions.

Suggested Citation

  • LOVO, Stefano & ALBANO, Gian Luigi & GERMANO, Fabrizio, 2002. "On some collusive and signaling equilibria in ascending auctions for multiple objects," Les Cahiers de Recherche 765, HEC Paris.
  • Handle: RePEc:ebg:heccah:0765

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    References listed on IDEAS

    1. Cramton, Peter & Schwartz, Jesse A, 2000. "Collusive Bidding: Lessons from the FCC Spectrum Auctions," Journal of Regulatory Economics, Springer, vol. 17(3), pages 229-252, May.
    2. Paul R. Milgrom, 1985. "Auction Theory," Cowles Foundation Discussion Papers 779, Cowles Foundation for Research in Economics, Yale University.
    3. Paul Klemperer, 2002. "What Really Matters in Auction Design," Journal of Economic Perspectives, American Economic Association, vol. 16(1), pages 169-189, Winter.
    4. Anthony M. Kwasnica & Katerina Sherstyuk, 2001. "Collusion via Signaling in Multiple Object Auctions with Complementarities- An Experimental Test," Working Papers 200102, University of Hawaii at Manoa, Department of Economics.
    5. Albano, Gian Luigi & Germano, Fabrizio & Lovo, Stefano, 2001. "A comparison of standard multi-unit auctions with synergies," Economics Letters, Elsevier, vol. 71(1), pages 55-60, April.
    6. Cramton, Peter, 1998. "Ascending auctions," European Economic Review, Elsevier, vol. 42(3-5), pages 745-756, May.
    7. Cramton Peter & Schwartz Jesse A, 2002. "Collusive Bidding in the FCC Spectrum Auctions," The B.E. Journal of Economic Analysis & Policy, De Gruyter, vol. 1(1), pages 1-20, December.
    8. Branco, Fernando, 2001. "On the superiority of the multiple round ascending bid auction," Economics Letters, Elsevier, vol. 70(2), pages 187-194, February.
    9. Krishna, Vijay & Rosenthal, Robert W., 1996. "Simultaneous Auctions with Synergies," Games and Economic Behavior, Elsevier, vol. 17(1), pages 1-31, November.
    10. Christopher Avery, 1998. "Strategic Jump Bidding in English Auctions," Review of Economic Studies, Oxford University Press, vol. 65(2), pages 185-210.
    11. Klemperer, Paul, 1998. "Auctions with almost common values: The 'Wallet Game' and its applications," European Economic Review, Elsevier, vol. 42(3-5), pages 757-769, May.
    12. David McAdams, 2003. "Isotone Equilibrium in Games of Incomplete Information," Econometrica, Econometric Society, vol. 71(4), pages 1191-1214, July.
    13. Peter Cramton, 2002. "Spectrum Auctions," Papers of Peter Cramton 01hte, University of Maryland, Department of Economics - Peter Cramton, revised 16 Jul 2001.
    14. R. Preston McAfee & John McMillan, 1996. "Analyzing the Airwaves Auction," Journal of Economic Perspectives, American Economic Association, vol. 10(1), pages 159-175, Winter.
    15. Athey, Susan, 2001. "Single Crossing Properties and the Existence of Pure Strategy Equilibria in Games of Incomplete Information," Econometrica, Econometric Society, vol. 69(4), pages 861-889, July.
    16. Ruqu Wang & Alan Gunderson, 1998. "Signally by Jump Bidding in Private Value Auctions," Working Papers 975, Queen's University, Department of Economics.
    17. Milgrom, Paul, 1998. "Game theory and the spectrum auctions," European Economic Review, Elsevier, vol. 42(3-5), pages 771-778, May.
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    More about this item


    Multi-unit auctions; Ascending auctions; FCC auctions; Collusion; Retaliation;

    JEL classification:

    • C72 - Mathematical and Quantitative Methods - - Game Theory and Bargaining Theory - - - Noncooperative Games
    • D44 - Microeconomics - - Market Structure, Pricing, and Design - - - Auctions

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