Lambertini, Luca; Tampieri, Alessandro - In: Resource and Energy Economics 34 (2012) 3, pp. 374-380
We modify the vertically differentiated duopoly model by André et al. (2009) replacing Bertrand with Cournot behaviour, and we characterise the region wherein a Porter-type result takes place. We show that the Porter hypothesis applies in an equilibrium taking always the form of a prisoner's...