Michel De Lara (CERMICS) - An insight into the value of information using duality between payoffs and beliefs

Quoting Jack Hirshleifer, ``Information is of value only if it can affect action". We consider an economic agent who acquires information on a state of nature before facing a decision problem. By using a duality between actions/payoffs and beliefs, we shed light on the value of information and show how it can be measured by the impact of information on optimal actions. More precisely, using tools from convex analysis, we relate the geometry of the actions/payoffs set --- kink, flat, curved --- to Read more [...]