Internet auctions attract numerous agents, but only a few become active bidders. Under the Independent Private Values Paradigm the valuations of the active bidders form a specific record sequence. This record sequence implies that if the number n of potential bidders is large, the number of...

We study auctions in which the number of potential bidders is large, such as in Internet auctions. With numerous bidders, the expected revenue and the optimal bid function in a first price auction result in complicated expressions, except for a few simple distribution function for the bidders'...

We investigate the determinants of price for tractor auctions on eBay and tractors that are listed in the Farmers and Consumers Market Bulletin (FCMB) in Georgia. Surprisingly, seller reputation is not an important factor while engine hours and the presence of air conditioning appear to...

Internet auctions are common in nearly all consumer categories. Hence, it is not surprising that a great deal of research has emerged on the topic in recent years. New design and format considerations and a wealth of available data from various platforms provide new questions and promising...

I study an auction format called penny auctions. In these auctions, every bid increases the price by a small amount, but it is costly to place a bid. The auction ends if more than some predetermined amount of time has passed since the last bid. Outcomes of real penny auctions are surprising:...

Humans have long been fascinated with celebrated persons. Because celebrities are usually protected, fans rely on celebrity-related products to connect to a beloved individual. As symbolic embodiments of celebrities, these related products often become cherished personal possessions. The death...

The present paper proposes a theoretical model of the equilibrium bidding behavior in simultaneous competing private-value Internet auctions such as those on eBay. It shows that last-minute bidding and multiple bidding, two commonly observed bidding strategies, arise in equilibrium. It also...

We model an Internet auction with a temporary buyout option. Our main result shows that under certain parameter values, there exist two types of equilibria where offering a temporary buyout option with an appropriate reserve price enables the seller to increase expected revenue.

Online reverse auctions generate real-time bidding data that could be used via appropriate statistical estimation to assist the corporate buyer's procurement decision. To this end, we develop a method, called BidAnalyzer, which estimates dynamic bidding models and selects the most appropriate of...