Consumers and businesses rely on others' ratings of items when making choices. However, individual reviewers vary in their accuracy, and some are biased -- either systematically over- or under-rating items relative to others' tastes, or even deliberately distorting a rating. We provide a new...

Production of knowledge relies on peer effects and interactions between researchers. However, little is known on how much policies may stimulate these peer effects. In this paper we shed light on this question, and show how a public "research cluster'' policy, which funds local networks of...