The paper aims to test the existence of different regimes in the growth process. We propose a simple nonlinear growth model which features different relationships between growth rate and income level. We iden tify its testable implications in terms of state space dynamics. By estimating Markov...

The models of technology diffusion originally proposed by Metcalfe (1981), Batten (1987) and Amable (1992) are modified so as to allows for price expectations of adopters and suppliers of an innovation. We show many interesting and somewhat unexpected results, which were not noticed in the...