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Defensive sniping and efficiency in simultaneous hard-close proxy auctions

  • Taylor, Greg

A well-known myopic bidding strategy fails to support an equilibrium of simultaneous ascending proxy auctions for heterogeneous items when a hard-close rule is in place. This is because, in common with the single-auction case, last minute bidding (sniping) is a best response to naive behaviour. However, a modification to the myopic strategy in which all bidders submit an additional bid in the closing stages of the auction–a practice I call ‘defensive sniping’–is shown to yield an efficient, belief-free equilibrium of such environments. This equilibrium is essentially unique within the class of belief-free, efficient equilibria.

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Article provided by Elsevier in its journal Journal of Mathematical Economics.

Volume (Year): 48 (2012)
Issue (Month): 1 ()
Pages: 51-58

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Handle: RePEc:eee:mateco:v:48:y:2012:i:1:p:51-58
DOI: 10.1016/j.jmateco.2011.11.006
Contact details of provider: Web page: http://www.elsevier.com/locate/jmateco

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  7. Chiang, Kevin C.H. & Kung, Ashley W.P., 2005. "Bidding dynamics in multi-unit auctions: empirical evidence from online auctions of certificates of deposit," Journal of Financial Intermediation, Elsevier, vol. 14(2), pages 239-252, April.
  8. Jeffrey C. Ely & Tanjim Hossain, 2009. "Sniping and Squatting in Auction Markets," American Economic Journal: Microeconomics, American Economic Association, vol. 1(2), pages 68-94, August.
  9. Patrick Bajari & Ali Hortaçsu, 2004. "Economic Insights from Internet Auctions," Journal of Economic Literature, American Economic Association, vol. 42(2), pages 457-486, June.
  10. Axel Ockenfels & Alvin E. Roth, 2003. "Late and Multiple Bidding in Second Price Internet Auctions: Theory and Evidence Concerning Different Rules for Ending an Auction," CESifo Working Paper Series 992, CESifo Group Munich.
  11. Steven R. Williams, 1999. "A characterization of efficient, bayesian incentive compatible mechanisms," Economic Theory, Springer;Society for the Advancement of Economic Theory (SAET), vol. 14(1), pages 155-180.
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