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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 highpowered 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.

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This study investigates the role of exclusive content provision in two‐sided markets in which both sides are allowed to join multiple platforms. We consider a model of duopolistic two‐sided platform market with a monopolistic multiproduct firm (content provider) on one side and consumers on the other. The model demonstrates that the monopolistic content provider uses exclusivity as strategic commitment to balance two opposite effects on its bargaining power: the positive effect caused by the increase in multihoming consumers and the negative effect caused by the restriction of distribution channels.

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