The prohibition of certain types of anticompetitive unilateral conduct by firms possessing a substantial degree of market power is a cornerstone of competition law regimes worldwide. Yet notwithstanding the social costs of monopoly modern legal regimes refrain from prohibiting it outright....

This paper examines the prices versus quantities issue, originally raised by Weitzman [8], in the context of carbon dioxide emissions and with a special focus on electricity generation. Within a simpli ed model of the electricity market, in which we explicitly allow for a monopolistic gas...