Cooperative R&D between Vertically Related Firms with Spillovers

This paper analyzes the effects of cooperative R&D in two vertically related duopolies, which are two final-good manufacturers and two input suppliers, with horizontal and vertical spillovers. Vertical R&D cartels yield a larger social welfare than non-cooperative R&D and, if the horizontal spillover rate between the input suppliers is not sufficiently high, than horizontal R&D cartels. Technological improvement is accelerated by forming vertical research joint ventures (RJVs), whether or not their member firms’ R&D decisions are coordinated. Vertical RJV cartels yield the largest social welfare when the vertically related firms can coordinate their R&D decisions and/or share useful knowledge fully.