This paper examines alternative methods which have been used to measure aggregate energy consumption over time. It is found that many of the measures which have been widely used in empirical studies are not appropriate for economic analysis. The concept of 'useful energy', popular in engineering...

This paper investigates pure strategy sequential equilibria of repeated games with imperfect monitoring. The approach emphasizes the equilibrium value set and the static optimization problems embedded in extremal equilibria. A succession of propositions, central among which is "self-generation,"...