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...

We examine, in the context of less developed countries, the R&D behaviour of igopolistic firms who compete over R&D, as well as output levels. We also assume that the firms can sell in either of the two markets - the domestic, or the foreign. We show that entry liberalization, despite increasing...