taking an (irreversible) action. We define \textit{asymptotic learning} as the fraction of agents taking the correct action … converging to one as a society grows large. Under truthful communication, we show that asymptotic learning occurs if (and under … ``information hubs'', which receive and distribute a large amount of information. Asymptotic learning therefore requires information …

We study social learning in a social network setting where agents receive independent noisy signals about the truth …

We study the perfect Bayesian equilibria of a sequential model of social learning in networks where agents learn about … agents' sets of neighbors are mutually independent. We introduce a new, weaker metric of social learning, information … observing a decision does not greatly alter its informativeness. This characterization allows us to establish positive learning …