Pinto, Alberto A.Ferreira, Fernanda A.Ferreira, MiguelOliveira, Bruno M. P. M.2016-01-112016-01-112007http://hdl.handle.net/10400.22/7353We present a new R&D investment in a Cournot Duopoly model and we analyze the different possible types of Nash R&D investments. We observe that the new production costs region can be decomposed in three economical regions, depending on the Nash R&D investment, showing the relevance of the use of patents in new technologies.engconference object10.1002/pamm.200701031