Crowd-sourced recommender platforms organize social learning about products by recommending items based on information … study how market structure affects experimentation, social learning, and welfare. I present a model of competing platforms … by the platforms. I compare incentives to experiment for competing platforms to those of a merged platform as well as a …

We study learning in perfect competition. A price-taking firm sells a good whose quality is unknown to some buyers. The … uninformed buyers use the price to infer information about quality. The presence of noise on the supply prevents perfect learning … learning process of the uninformed buyers …