data. Moreover, numerous innovations in auction-design features on platforms such as eBay have created excellent research …-now options) in online auctions, as well as some of the literature dealing with online-auction design (including stopping rules …

consumer search on the internet. The extensive nature of the eBay data allows us to examine a rich and detailed set of …

incomplete bid data typically available to the auction designer in online auctions for advertising or e-commerce. This direct … auction observations needed in order for revenue under the estimated reserve price to approximate revenue under the optimal … reserve arbitrarily closely. This simple approach to estimating reserves may be particularly useful for auction design in Big …

The transition of the advertising market from traditional media to the internet has induced a proliferation of … marketing agencies specialized in bidding in the auctions that are used to sell ad space on the web. We analyze how collusive … bidding can emerge from bid delegation to a common marketing agency and how this can undermine the revenues and allocative …

This paper surveys recent studies of Internet auctions. Four main areas of research are summarized. First, economists … have documented strategic bidding in these markets and attempted to understand why sniping, or bidding at the last second …'s curse. Third, we explore research about the role of reputation in online auctions. Finally, we discuss what Internet …

There is a great deal of late bidding on internet second price auctions. We show that this need not result from either … common value properties of the objects being sold, or irrational behavior: late bidding can occur at equilibrium even in … this opens a way for bidders to implicitly collude, and avoid bidding wars, in auctions such as those run by eBay, which …

The internet has dramatically reduced the cost of varying prices, displays and information provided to consumers …, facilitating both active and passive experimentation. We document the prevalence of targeted pricing and auction design variation … illustrative results on price dispersion, the frequency of over-bidding, the choice of reserve prices, "buy now" options and other …

"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 …

opportunities to trade. We examine this idea empirically by developing a tractable dynamic model of bidding in an overlapping …, sequential auction environment and estimating the model with detailed data from eBay. Bidders in the model discount their bids to …