Collusion and information revelation in auctions

Information revelation in auctions

Auction theory has emphasized the importance of private information to the profits of bidders. However, the theory has failed to consider the question of whether or not bidders will be able to keep their information private. We show that in a variety of contexts bidders will reveal all their information, even if this information revelation is (ex ante) detrimental to them. Similarly, a seller m...

Private information revelation in common-value auctions

When a seller has information that could help bidders to estimate asset value, a dictum of auction theory has been that all such information should be publicly announced to bidders. The possibility of privately revealing this information to one or more bidders is introduced. Seller in some circumstances may attain higher expected revenue through revealing his information privately. Examples sho...

Information Revelation in Sequential Ascending Auctions

We examine a model in which buyers with single-unit demand are faced with an infinite sequence of auctions. In each period, a new buyer probabilistically arrives to the market, and is endowed with a constant private value. We demonstrate by way of a simple example the inefficiency of the second-price sealed-bid auction in this setting, and therefore focus instead on the ascending auction. We th...

An Experimental Study of Information Revelation Policies in Sequential Auctions

Theoretical models of information asymmetry have identified a tradeoff between the desire to learn and the desire to prevent an opponent from learning private information. This paper reports a laboratory experiment that investigates if actual bidders account for this tradeoff, using a sequential procurement auction with private cost information and varying information revelation policies. Speci...

Price-Based Information Certificates for Minimal-Revelation Combinatorial Auctions