We consider the portfolio delegation problem in a world with complete contingent claim markets. A principal hires an agent to manage a portfolio. When the agent has limited liability (that is, there is a lower bound on the compensation contract), she may have an incentive to take on excessive...

The main result of this paper is that the multiple equilibrium problem in mechanism design can be avoided in private-value models if agents do not use weakly-dominated strategies in equilibrium. The authors show that, in such settings, any incentive-compatible allocation rule can be made the...