Bayesian experts with a common prior that are exposed to different types of evidence possibly make contradicting probabilistic forecasts. A policy maker who receives the forecasts must aggregate them in the best way possible. This is a challenge whenever the policy maker is not familiar with the...

We study a monopolist that uses the following scheme to gauge market traction for its common-value, excludible product. The monopolist offers its product at a given price, and each potential consumer decides whether to buy it. The contributions are collected. The product is supplied only if the...

Society uses the following mechanism to decide on the supply of a public good. Each agent canchoose whether or not to contribute to the good. Contributions are collected, and the good issupplied whenever total contributions exceed a threshold. We study the case where the publicgood is...