We examine pollution-reducing R&D by a monopoly firm producing a dirty product. In a dynamic framework with hyperbolic discounting, we establish conditions under which the Porter hypothesis goes through, i.e. environmental regulation increases R&D, thus reducing pollution, as well as increasing...

Although regulatory authorities are putting more emphasis to the long-run effects of mergers and acquisitions due to their effects on innovation, several merger proposals have been challenged due to their adverse innovation effects. In a simple model with endogenous R&D investment, we show that...

This paper extends the literature on mixed oligopoly in two directions. First, it introduces distortions in the working of the public firm, an issue that is of some concern, especially in transitional economies. Thus the classical model of mixed oligopoly emerges as a special case of our...