Assume the following demand functions for a differentiated duopoly:
P1 = 100 – 0.5Q1 – 0.4Q2 & P2 = 100 – 0.5Q2 – 0.4Q1. There are no costs. The first firm plays Cournot (selects Q) and the second firm plays Bertrand (selects P). Find the optimal Nash quantity-price solution .