We consider the strategic use of information by an online platform to both guide consumer search through its product recommendations and influence sellers' targeting and advertising decisions. The model provides a unified view of personalized product recommendation and targeted advertising on...

Online ratings play an important role in many markets. However, how fast they can reveal seller types remains unclear. To study this question, we propose a new model in which a buyer learns about the seller’s type from previous ratings and her own experience and rates the seller if she learns...