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Collusion via signaling in open ascending auctions with multiple objects and complementarities

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  • Brusco, Sandro
  • Lopomo, Giuseppe

Abstract

Collusive equilibria exist in open ascending auctions with multiple objects, if the number of bidders is sufficiently small relative to the number of objects, even with large complementarities in the buyers' utility functions. The bidders collude by dividing the objects among themselves, while keeping the prices low. Hence the complementarities are not realized.

Suggested Citation

  • Brusco, Sandro & Lopomo, Giuseppe, 1999. "Collusion via signaling in open ascending auctions with multiple objects and complementarities," DEE - Working Papers. Business Economics. WB 6518, Universidad Carlos III de Madrid. Departamento de Economía de la Empresa.
    • Handle: RePEc:cte:wbrepe:6518
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    References listed on IDEAS

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    1. Mailath, George J. & Zemsky, Peter, 1991. "Collusion in second price auctions with heterogeneous bidders," Games and Economic Behavior, Elsevier, vol. 3(4), pages 467-486, November.
    2. Lopomo, Giuseppe, 1998. "The English Auction Is Optimal Among Simple Sequential Auctions," Journal of Economic Theory, Elsevier, vol. 82(1), pages 144-166, September.
    3. Paul Milgrom, 2000. "Putting Auction Theory to Work: The Simultaneous Ascending Auction," Journal of Political Economy, University of Chicago Press, vol. 108(2), pages 245-272, April.
    4. Graham, Daniel A & Marshall, Robert C, 1987. "Collusive Bidder Behavior at Single-Object Second-Price and English Auctions," Journal of Political Economy, University of Chicago Press, vol. 95(6), pages 1217-1239, December.
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    Cited by:

    1. Gian Albano & Fabrizio Germano & Stefano Lovo, 2006. "Retaliatory Equilibria in a Japanese Ascending Auction for Multiple Objects," Review of Economic Design, Springer;Society for Economic Design, vol. 10(1), pages 1-8, April.
    2. Paul Klemperer, 2002. "What Really Matters in Auction Design," Journal of Economic Perspectives, American Economic Association, vol. 16(1), pages 169-189, Winter.
    3. Sherstyuk, Katerina, 2008. "Some Results on Anti-Competitive Behavior in Multi-Unit Ascending Price Auctions," Handbook of Experimental Economics Results, in: Charles R. Plott & Vernon L. Smith (ed.), Handbook of Experimental Economics Results, edition 1, volume 1, chapter 23, pages 185-198, Elsevier.
    4. Ken Binmore & Paul Klemperer, 2002. "The Biggest Auction Ever: the Sale of the British 3G Telecom Licences," Economic Journal, Royal Economic Society, vol. 112(478), pages C74-C96, March.

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