Online product ratings are widely available on the Internet and are known to influence prospective buyers. An emerging literature has started to look at how ratings are generated and in particular how they are influenced by prior ratings. We study the social influence of prior ratings and, in...

Peer-to-Peer (P2P) networks, a decentralized content distribution format in which users distribute media to each other, is fast gaining popularity for delivery of digital media such as music and videos. Product diffusion in P2P is unique because free riders ý users who download content from...

Cooperative caching is a popular mechanism to allow an array of distributed caches to cooperate and serve each others' web requests. Monitoring and controlling duplication of documents across cooperating caches is a challenging operational problem faced by cache managers. In this paper, we...

In Peer-to-Peer (P2P) media distribution, users obtain content from other users who already have it. This form of decentralized product distribution demonstrates several unique features. Only a small fraction of users in the network are queried when a potential adopter seeks a file and many of...