Behavioral Economics Commons^™

Theoretical And Experimental Analysis Of Auctions With Negative Externalities, Youxin Hu, John Kagel, Lixin Ye

Youxin Hu

We investigate a model in which a single bidder (the “entrant”), on winning the auction, imposes a negative externality on two “regular” bidders. In an ascending price clock auction, in equilibrium when all bidders are active a regular bidder free rides, dropping out before reaching his private value. Despite this free riding problem, in almost all cases, the item is ex post efficiently assigned. In contrast, in a first-price sealed bid auction incentives for free riding and aggressive bidding coexist, leading to a lower ex post efficiency. The experiment shows minimal free riding in the clock auction, but as predicted, …