Bidders' risk attitudes have key implications for choices of revenue-maximizing auction formats. In ascending auctions … entry costs but contains exogenous variations of potential competition and auction characteristics. In the first scenario … equilibrium entry probabilities vary with observed auction characteristics and potential competition. We also show identification …

have a fixed end time. A natural experiment is available because the auctions on Amazon, while operating under otherwise … passed without a bid. The strategic differences in the auction rules are reflected in the auction data by significantly more … about ending the auction playing an important role …

“per install” basis—plays a major role in the mix and characteristics of auction winners, and, consequently, in their … number of such users. The distortion becomes worse as the auction gets more competitive and the number of bidders increases …

profit of larger firms. We explain these findings by connecting to the theory of optimal auction design …