We develop a model in which ex ante identical firms make endogenous entry and technology adoption decisions. We show that this model is capable of matching the stylized facts in which entry and adoption are dispersed over time and that, in many industries, it is the newest firms which are the...

This article analyzes the adoption and diffusion of new technology in a market for a differentiated product with monopolistic competition. I show that in a noncooperative equilibrium ex ante identical firms adopt a new technology at different dates. This equilibrium can be described by a simple...