We develop a model of information exchange through communication and investigate its implications for information aggregation in large societies. An \textit{underlying state} determines payoffs from different actions. Agents decide which others to form a costly \textit{communication link} with,...

This paper considers a population of agents that are engaged in a listening network. The agents wish to match their actions to the true value of some uncertain (exogenous) parameter and to the actions of the other agents. Each agent begins with some initial information about the parameter and,...

This paper reports on experiments testing the viability of markets for cheap talk information. We find that the poor quality of the information transmitted leads to a collapse of information markets. The reasons for this are surprising given the previous experimental results on cheap-talk games....

We examine multistage information transmission with voluntary monetary transfer in the framework of Crawford and Sobel (1982). In our model, an informed expert can send messages to an uninformed decision maker more than once, and the uninformed decision maker can pay money to the informed expert...

We study perfect Bayesian equilibria of a sequential social learning model in which agents in a network learn about an underlying state by observing neighbors' choices. In contrast with prior work, we do not assume that the agents' sets of neighbors are mutually independent. We introduce a new...

This paper analyzes the issue of implementing correlated and communication equilibria when pre-play communication is restricted to a particular network (e.g., a hierarchy). When communication between the mediator and the players is not direct and private, as assumed when invoking the revelation...

We implement multi-sender cheap talk in the laboratory. While full-information transmission is not theoretically feasible in the standard one-sender-one- dimension model, in this setting with more senders and dimensions, full revelation is generically a robust equilibrium outcome. Our...

We study optimal information disclosure in static contests where players do not know their own values of winning but can learn them, publicly or privately, from the designer. The designer chooses a disclosure policy that maximizes the total expected effort and commits to it before observing the...

We analyze a cheap talk model in which an informed sender and an uninformed receiver engage in finite-period communication before the receiver chooses a project. During the communication phase, in each period, the sender sends a cheap talk message and the receiver voluntarily pays money for the...

More voters than ever get political news from their friends on social media platforms. Is this bad for democracy? Using context-neutral laboratory experiments, we find that biased (mis)information shared on social networks affects the quality of collective decisions relatively more than does...