Discussion Paper Series Asymmetric Information about Rivals’ Types in Standard Auctions: An Experiment

This paper studies experimentally how information about rivals ’ types affects bidding behavior in first- and second-price auctions. The comparative static hy-potheses associated with information about rivals enables us to test the relevance of such information as well as the general predictions of the auction theory, by providing an effective means to control for risk aversion and other behavioral mo-tives that were difficult to control for in previous experiments. Our experimental evidence provides strong support for the theory, and sheds light on the roles of risk aversion and the spite motive in first- and second-price auctions, respectively