Title:Buying Opinions

 Abstract: A principal hires an agent to acquire soft information about an unknown state. Even though neither how the agent learns (the experiment chosen by the agent) nor what the agent discovers (the realization of the experiment) are contractible, the principal is unconstrained as to what information the agent can be induced to acquire and report honestly. When the agent is risk neutral, and a) is not asked to learn too much, b) can acquire information sufficiently cheaply, or c) can face sufficiently large penalties, the principal can attain the first-best outcome. Risk aversion (by the agent) introduces inefficiencies: the first-best is unattainable, though whether the agent obtains rents depends on whether he may exit to take his outside option after learning.