Relational contracting and endogenous formation of teamwork

We study a relational contracting model with two agents where each agent faces multiple tasks: effort toward the agent's own project and helping effort toward another agent's project. We show that the optimal task structure is either specialization without help or teamwork with a substantial amount of help: teamwork with a small amount of help is never optimal. Specialization with high-powered incentives can be implemented by relative performance evaluation. However, under teamwork, the evaluation scheme must be substantially different to overcome the multitasking problem. Consequently, a small amount of help is dominated by specialization with high powered incentives.