Online communities provide a social sphere for people to share information and knowledge. While information sharing is becoming a ubiquitous online phenomenon, how to ensure information quality or induce quality content, however, remains a challenge due to the anonymity of commentators. This...

Online reputation trading is a new phenomenon facilitated by the prosperity of e-commerce and social networks. Whether reputations will be reliable when people can purchase rather than build their reputations is a natural concern and also a challenge to online marketplaces. In the present study,...

We study reputations with imperfect audit and a reputation market. The main result shows the existence of a separating equilibrium in the reputation market, which contrasts with Tadelis [Tadelis, S., 2002, The market for reputations as an incentive mechanism, Journal of Political Economy 110(4),...

We set up a game-theoretic model to examine the oligopolistic price competition, considering two features of online search: the existence of a common search ordering and shoppers who have non-positive search cost. We find that in equilibrium firms set their prices probabilistically rather than...

Procurement auctions are sometimes plagued with a chosen supplier's failing to accomplish a project successfully. The risk of project failure is considerable, especially when the buyer has inadequate information about suppliers ex ante and the project can only be evaluated at the end. To manage...

This paper studies how to endogenously assess the value of a ldquo;superiorrdquo; advertising position within the price competition and examines the resulting location competition outcomes and price dispersion patterns. We consider a game-theoretic model in which firms compete for advertising...

Motivated by the enormous growth of keyword advertising, this paper explores the design of unit-price contract auctions, in which bidders bid their unit prices, and the winner is chosen based on both their bids and performance levels. The previous literature in unit-price contract auctions...

This paper analyzes how the presence of organic listing as a competing information source affects advertisers' sponsored bidding and the equilibrium outcomes in search advertising. We consider a game-theoretic model in which two firms bid for sponsored advertising slots provided by a...

Keyword advertising, or "sponsored links" that appear alongside online search results or other online content, has grown into a multibillion-dollar market. Providers of keyword advertising, such as Google and Yahoo!, profit by auctioning keywords to advertisers. One issue of increasing...

Online communities provide a social sphere for people to share information and knowledge. While information sharing is becoming a ubiquitous online phenomenon, how to ensure information quality or induce quality content, however, remains a challenge due to the anonymity of commentators. This...