Many internet firms use A/B tests to make product decisions. In an A/B test, the typical objective is to measure the total average treatment effect (TATE), which measures the difference between the average outcome if all users were treated and the average outcome if all users were untreated....

Much of the prominent literature describing behavior in eBay-like marketplaces emphasizes the successful use of “sniping” agents that wait until the last moments of an auction to bid (truthfully) on behalf of a human user. These agents fare well against “naïve” agents (typically assumed...

In this paper, we estimate the inefficiency in online auctions. Online auctions can be inefficient due to the Internet fraud. A typical example of Internet fraud is when sellers do not send goods to winning bidders even though they have received payment. Therefore, bidders always bear a risk of...

The use and popularity of online auctions is exploding all over the world. Bidding strategies are important because they are related to an auction's final price and ultimately its revenue. This study investigates the bidding strategies adopted by online bidders and the factors of the bidders,...

We partnered with a large online auction website to test differing messages' effects on the decision to donate to charity at checkout. Our setting, where impulsive decisions are likely to be driving donations, allows us to evaluate intuitive responses to messages prompting a donation. We find...

Online marketplaces are increasingly adopting innovative business models such as using paid advertising as a major revenue source. We explore the two popular advertising tools, sponsored search and social media endorsement, in attracting web traffic from online sellers' perspective. We estimate...

A marketplace such as Amazon hosts a variety of products by third party sellers and acts as a first party or private label retailer. Assuming an advantage of Amazon in logistics and of sellers in marketing, we investigate whether entry by Amazon is excessive from the point of view of consumers...

In recent years, the rapid development of online marketplaces has not only given rise to co-opetitive relationships between sellers but also to information asymmetry between online marketplaces and sellers. This paper studies information sharing in an e-commerce setting consisting of an online...