What do Amazon's product reviews, eBay's feedback score system, Slashdot's Karma System, and Xbox Live's Achievements have in common? They're all examples of su

Experts discuss the benefits and risks of online reputation systems. In making decisions, we often seek advice. Online, we check Amazon recommendations, eBay ve

It would be easy to cheat someone on eBay. However, an essential characteristic of the site prevents this from happening: buyer and seller reviews form what amo

How insights from the social sciences, including social psychology and economics, can improve the design of online communities. Online communities are among the

Gossip and reputation are core processes in societies and have substantial consequences for individuals, groups, communities, organizations, and markets.. Acade