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Estimation of Beauty Contest Auctions

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  • Hema Yoganarasimhan

    (University of Washington, Seattle, Washington 98195)

Abstract

Beauty contests are auction mechanisms used to buy or sell differentiated products where the auctioneer does not specify a decision rule to pick the winning bidder. Beauty contests are widely used in procuring welfare-to-work projects, freelance services, selling online ads, real estate transactions, and hiring, dating/marriage decisions. Unlike price-only auctions, beauty contests have no closed-form bidding strategies and suffer from nonmultiplicatively separable unobserved auction heterogeneity, which makes their estimation challenging. To address these challenges, we formulate beauty contests as incomplete information games and present a two-step estimator. A key contribution of our method is its ability to account for common-knowledge auction-specific unobservables using finite unobserved types. We show that unobserved auction types and distributions of bids are nonparametrically identified and recoverable in the first step using a nonparametric Expectation-Maximization (EM)-like algorithm, and that these can then be used in the second step to recover cost distributions. We present an application of our method in the online freelancing context. We find that seller margins in this marketplace are around 15% of the bid, and that not accounting for unobserved heterogeneity can significantly bias cost estimates in this setting. Based on our estimates, we run counterfactual simulations and provide guidelines to managers of freelance firms.Data, as supplemental material, are available at http://dx.doi.org/10.1287/mksc.2015.0929 .

Suggested Citation

  • Hema Yoganarasimhan, 2016. "Estimation of Beauty Contest Auctions," Marketing Science, INFORMS, vol. 35(1), pages 27-54, January.
  • Handle: RePEc:inm:ormksc:v:35:y:2016:i:1:p:27-54
    DOI: 10.1287/mksc.2015.0929
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    Cited by:

    1. Pavel Kireyev, 2016. "Markets for Ideas: Prize Structure, Entry Limits, and the Design of Ideation Contests," Harvard Business School Working Papers 16-129, Harvard Business School.
    2. Ari Hyytinen & Sofia Lundberg & Otto Toivanen, 2018. "Design of public procurement auctions: evidence from cleaning contracts," RAND Journal of Economics, RAND Corporation, vol. 49(2), pages 398-426, June.
    3. Yao, Ying & Tanaka, Makoto, 2020. "Price-quality trade-off in procurement auctions with an uncertain quality threshold," Journal of Economic Behavior & Organization, Elsevier, vol. 177(C), pages 56-70.

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