The present paper deals with the diffusion of the General Purpose Technologies (GPT) over heterogeneous finanl-good sectors. We show that the gradual adoption of the GPT by each user sector generates a sequence of two-phased cycles, culminating in a "second wave" after all sectors adopt,they...

We develop an equilibrium model of industrial structure in which the organization of firms is endogenous. Differentiated consumer products can be produced either by vertically integrated firms or by pairs of specialized companies. Production of each variety of consumer good requires a unique,...

It is apparent from the reported estimates that R&D is an important activity that has a major impact on the performing countries as well as on their trade partners. We may not yet have precise estimates of these impacts, both because of difficulties with available data and because of some...