Echo Chambers: Social Learning under Unobserved Heterogeneity
论文认为人们更受相似观点影响并寻求认同的行为并非非理性，而是未观测异质性下理性社会学习的结果，这会导致回音室的形成。
Abstract People are often more influenced by opinions similar to their own and even seek information from those with whom they expect to most agree—behaviours often attributed to irrational biases. In this paper, I argue that these behaviours can be understood within the context of rational social learning by accounting for the presence of unobserved heterogeneity in preferences or priors. Individuals display local learning by placing greater weight on opinions that are closer to their own. When individuals choose whom to learn from, local learning leads to the development of echo chambers.