English, Article, Journal or magazine article edition: A Note on Revenue Maximization and Efficiency in Multi-Object Auctions Jehiel, Phillipe; Moldovanu, Benny

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Bookmark: http://trove.nla.gov.au/version/43265
Physical Description
  • preprint
Language
  • English

Edition details

Title
  • A Note on Revenue Maximization and Efficiency in Multi-Object Auctions
Author
  • Jehiel, Phillipe
  • Moldovanu, Benny
Physical Description
  • preprint
Notes
  • We consider an auction with risk neutral agents having independent private valuations for several heterogenous objects. Most of the literature on revenue-maximizing auctions has focused on the sale of one good or on the sale of several identical units (thus yielding one-dimensional informational models). Two reasons for inefficiency in revenue-maximizing auctions have been identified 1) The (monopolist) seller can increase revenue by restricting supply. 2) A revenue maximizing seller will sell to bidders with the highest ''virtual'' valuations (see Myerson, 1981). Virtual valuations are adjusted valuations that take into account bidders' informational rents, and depend on the distribution of private information. Asymmetries among bidders (and possibly other properties of these distributions) drive a wedge between virtual and true valuations, leading to inefficiencies (see Ausubel and Cramton, 1998 for a recent discussion of these issues). Our purpose here is to illustrate in the simplest possible way that a revenue-maximizing seller of several heterogenous objects has incentives to ''misallocate'' the sold objects even in symmetric settings, and no matter what the (symmetric) function governing the distribution of private information is. This inefficiency result should be contrasted with the efficiency result in Armstrong (1998) that applies only to some cases with discrete distributions of valuations.
  • RePEc:xrs:sfbmaa:99-73
Language
  • English
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