A buyer with private information regarding marginal valuation bargains with a seller to determine price and quantity of trade. Depending on parameter values, a high-valuation buyer wants either to reveal information to create value or to conceal it to capture value. In the first case,...

In many real-world contests (political elections / lobbying for public projects), contestants try to engage supporters (unemployed youth / local residents) to fight for them. Such contests have the following features: a significant part of a contestant's supporter compensation is contingent upon...