‘ Know Thy Enemies ’ : Knowledge of Rivals ’ Types and Its Effect on Auctions ∗

Abstract

We study auctions in which bidders may know the types of some rival bidders but not others. This asymmetry in bidders’ knowledge about rivals’ types has different effects on the two standard auction formats. In a second-price auction, it is weakly dominant to bid one’s valuation, so the knowledge of rivals’ types has no effect, and the good is allocated… (More)

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