A coopetitive model for the green economy

► Our model addresses climate change policy and diffusion of low-carbon technologies. ► We devise an appropriate game theory model, by a non-trivial coopetitive approach. ► We assume the country-player interaction to be a non-cooperative à la Cournot game. ► We consider the sunk costs required to adopt innovative low-carbon technologies. ► We find a fair Kalai-Pareto solution, of our coopetitive model in a win-win scenario.