Potential bidders respond to a seller's choice of auction mechanism for a common-value or affiliated-values asset by endogenous decisions whether to incur a participation cost (and observe a private signal), or forego competing. Privately informed participants decide whether to incur a bid-preparation cost and pay an entry fee, or cease competing. Auction rules and information flows are quite general; participation decisions may be simultaneous or sequential. The resulting revenue identity for any auction mechanism implies that optimal auctions are allocatively efficient; a nontrivial reserve price is revenue-inferior for any common-value auction. Characterization of optimal auctions is otherwise contentless, in that any auction that sells without reserve is within the setting of one continuous parameter of an optimal auction; seller's surplus-extracting tools are now substitutes, not complements. Revenue comparisons from the exogenous-bidders literature are upheld in a half-space of parameters, overturned in a half-space. Many econometric studies of auction markets are seen to be flawed in their identifcation of the number of bidders.
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Paper provided by Department of Economics, University of Missouri in its series Working Papers with number
0504.
Find related papers by JEL classification: D44 - Microeconomics - - Market Structure and Pricing - - - Auctions D82 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Asymmetric and Private Information C72 - Mathematical and Quantitative Methods - - Game Theory and Bargaining Theory - - - Noncooperative Games
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Roger B. Myerson, 1978.
"Optimal Auction Design,"
Discussion Papers
362, Northwestern University, Center for Mathematical Studies in Economics and Management Science.
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Paul R. Milgrom, 1978.
"Rational Expectations,"
Discussion Papers
406, Northwestern University, Center for Mathematical Studies in Economics and Management Science.
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