Financing constraints have been discussed as a major obstacle to innovation. Small and mediumsized enterprises and start-ups are particularly concerned by such impediments. Venture capital has emerged as a partial solution in some countries, but is only available for start-up firms with major...

This paper develops a two-industry model of R&D. A monopolist supplier sells an intermediate good to an oligopolistic buyer industry where firms compete in quantity and quality-enhancing R&D. The supplier can contribute to downstream product improvements by creating spillover knowledge which...