In this comment, we show that the existence of the preemption equilibrium in Fudenberg and Tirole (Review of Economics Studies, vol. 52, PP. 383-401, 1985)'s continuous-time games of timing is not guaranteed under their assumptions.

This paper deals with capacity constrained price competition in a duopoly model. The model resembles that in Kreps and Scheinkman (1983), but the timing of the investment/capacity choice is endogenous. In equilibrium, one of the firms will invest to become the Stackelberg leader, although the...