Jerez, BelénCSICUAB2009-09-252009-09-252001https://hdl.handle.net/10016/5324We show that incentive e cient allocations in economies with adverse se- lection and moral hazard can be determined as optimal solutions to a linear programming problem and we use duality theory to obtain a complete charac- terization of the optima. Our dual analysis identi es welfare e ects associated with the incentives of the agents to truthfully reveal their private information. Because these welfare e ects may generate non-convexities, incentive e cient allocations may involve randomization. Other properties of incentive e cient allocations are also derived.application/pdfengasymetric informationincentive efficiencylinear programmingdualityworking paperEconomíaopen access