The paper examines principal-agent relationships in uncertain environments where beliefs of the contracting parties (the regulator and the firm) are represented by sets of probabilities. In addition to fully characterizing the first-best and the second-best solutions, we examine optimality of...

We present a dual formulation of choice under uncertainty based on a few simple assumptions about preferences. It is shown that the additive separability restriction on preferences, key to expected-utility theory, can be dropped with little loss of analytic power for a broad class of choice...

This paper studies the structure of state-contingent contracts in the presence of moral hazard and multitasking. Necessary and sufficient conditions for the presence of multitasking to lead to fixed payments instead of incentive schemes are identified. It is shown that the primary determinant of...