The optimal design of two-part tariffs is investigated in a dynamic model where two firms belonging to the same supply chain invest in R&D activities to increase the quality of the final product. It is shown that the replication of the vertically integrated monopolist's performance can be...

We discuss the social welfare improvement under centralized and decentralized hierarchies and focus on supervisoris ability to monitor quality. Although the possibility of collusion against the principal is eliminated under decentralized hierarchy, the decentralization is dominating only if...