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Information disclosure in optimal auctions

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  • Ganuza, Juan-José
  • Penalva, Jose

Abstract

This paper analyzes a situation in which the seller controls the accuracy of what potential buyers learn about their valuation of a good to be sold. This setting is related to many real situations such as home sales, antique auctions, and digital platforms such as Google and Facebook selling online advertising slots. Two important questions arise: what is the optimal selling mechanism, and what is the optimal disclosure policy of the seller. Under the assumption of private values, a simple auction with a reserve price is the optimal mechanism. What we show is that the amount of (costly) information provided increases with the number of potential bidders when using the optimal mechanism and is greater than when the object is always sold. Because information changes the distribution of a bidder’s expected valuations, the optimal reserve price also changes, so that the number of bidders (indirectly) affects the reserve price. We show that as the number of bidders increases, the optimal reserve price becomes more restrictive.

Suggested Citation

  • Ganuza, Juan-José & Penalva, Jose, 2019. "Information disclosure in optimal auctions," International Journal of Industrial Organization, Elsevier, vol. 63(C), pages 460-479.
    • Handle: RePEc:eee:indorg:v:63:y:2019:i:c:p:460-479
    DOI: 10.1016/j.ijindorg.2018.11.004
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    References listed on IDEAS

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    Cited by:

    1. Anja Prummer & Francesco Nava, 2023. "Value Design in Optimal Mechanisms," Economics working papers 2023-05, Department of Economics, Johannes Kepler University Linz, Austria.

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    More about this item

    Keywords

    Optimal auction; Private values; Information disclosure and reserve price;
    All these keywords.

    JEL classification:

    • C72 - Mathematical and Quantitative Methods - - Game Theory and Bargaining Theory - - - Noncooperative Games
    • D44 - Microeconomics - - Market Structure, Pricing, and Design - - - Auctions
    • D82 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Asymmetric and Private Information; Mechanism Design
    • D83 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Search; Learning; Information and Knowledge; Communication; Belief; Unawareness

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