Evolutionary dynamics of a duopoly game with strategic delegation and isoelastic demand

We analyze a model of strategic delegation in Cournot competition with isoelastic demand. We first consider the static game and then we address an evolutionary version of it. We show that the result for which under quantity competition strategic delegation entails output expansion and higher consumers’ welfare than at the standard Cournot-Nash equilibrium is not necessarily true, but depends on the price elasticity of demand. Then, we study the main welfare implications of the model in order to understand whether the prevailing long-run industry configuration provides the highest welfare. We show that this may occur when both firms provide a mixed incentive and that, in this case, the model admits feasible trajectories the long-run configuration of which yields the highest welfare. Finally, we address the robustness of our results by means of an evolutionary model with heterogeneous players.