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Strategic Bidding for Multiple Units in Simultaneous and Sequential Auctions

Author

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  • Stéphane Airiau

    (University of Tulsa)

  • Sandip Sen

    (University of Tulsa)

Abstract

A buyer in an electronic marketplace may be interested in buying a bundle of items, where any one item in the bundle may not be of particular interest. The emergence of online auctions allow such users to obtain bundles by bidding on different simultaneous or sequentially run auctions. Because the number of auctions and the number of combinations to form the bundles may be large, the bundle bidding problem becomes intractable and the user is likely to make sub-optimal decision given time constraints and information overload. We believe that an automated agent that takes user preferences and budgetary constraints and can strategically bid on behalf of a user can significantly enhance user profit and satisfaction. Our first step to developing such an agent is to consider bundles containing many units of a single item to be bought from auctions that sell only multiple units of one item type. We assume that users obtain goods over several days. Expectations of auctions and their outcome in the future allow the agent to bid strategically on currently open auctions. We present an expected utility based strategy to decide how many items to bid for in the current auctions, and the maximum price to bid for each item. We evaluate our proposed strategy in different configurations by varying the number of items sold per auction, number of concurrently running auctions, expected closing prices, etc. We simulate several multiple unit English auctions per day, over multiple days, where most of the bidders bid their true utilities drawn from a distribution. The strategic bidding agent has knowledge of this distribution and uses it to determine its bids. A strategic agent who looks farther ahead into the future produces larger returns when there are few strategic bidders. We also evaluate the effect of risk attitudes on the relative performance of the bidders.

Suggested Citation

  • Stéphane Airiau & Sandip Sen, 2003. "Strategic Bidding for Multiple Units in Simultaneous and Sequential Auctions," Group Decision and Negotiation, Springer, vol. 12(5), pages 397-413, September.
  • Handle: RePEc:spr:grdene:v:12:y:2003:i:5:d:10.1023_b:grup.0000003741.29640.ac
    DOI: 10.1023/B:GRUP.0000003741.29640.ac
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    Citations

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    Cited by:

    1. Christian Kroemer & Martin Bichler & Andor Goetzendorff, 2016. "(Un)expected Bidder Behavior in Spectrum Auctions: About Inconsistent Bidding and Its Impact on Efficiency in the Combinatorial Clock Auction," Group Decision and Negotiation, Springer, vol. 25(1), pages 31-63, January.
    2. Farnia, Farnoush & Frayret, Jean-Marc & LeBel, Luc & Beaudry, Catherine, 2013. "Multiple-round timber auction design and simulation," International Journal of Production Economics, Elsevier, vol. 146(1), pages 129-141.
    3. Kemal Guler & Martin Bichler & Ioannis Petrakis, 2016. "Ascending Combinatorial Auctions with Risk Averse Bidders," Group Decision and Negotiation, Springer, vol. 25(3), pages 609-639, May.

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