The outcome of technological competition between firms (or countries) depends on the resolution of two forces: the profit incentive and the competitive threat. This is illustrated using a simple duopoly model. This model is then used to analyze two policy issues: subsidizing R & D and...

We examine a model of R&D competition and cooperation in the presence of spillovers. Unlike virtually all the literature, however, we treat these spillovers as endogenous and under the control of firms. We show that it is then essential to make a number of distinctions that are ignored in the...