Reward systems based on balanced scorecards typically connect pay to an index, i.e. a weighted sum of multiple performance measures. We show that such an index contract may indeed be optimal if performance measures are non-verifiable so that the contracting parties must rely on self-enforcement....

Reward systems based on balanced scorecards typically connect pay to an index, i.e. a weighted sum of multiple performance measures. We show that such an index contract may indeed be optimal if performance measures are non-verifiable so that the contracting parties must rely on self-enforcement....

Principal-agent models usually invoke the strong assumption that the parties know ex ante for sure whether a variable is verifiable or not. In this paper we assume that only the probability of verification is known, and that this probability is endogenously determined. We analyze a...