We analyze the impact of obsolescence of economic inventions by incorporating maintenance costsin the endogenous growth model of expanding product varieties. This contrasts with the existingliterature, which ignores maintenance costs and uses the model of quality improvements todescribe...

This North-South model of Schumpeterian endogenous growth combines a market, productivity and knowledge effect. A set of various convergent and divergent growth paths is derived that is much richer than in the literature so far. South-North convergence based on North-South technology diffusion...

We study economic growth and pollution control in a model with endogenous rate and direction of technical change. Economic growth (growth of real GDP) results from growth in the quantity and productivity of polluting intermediates. Pollution can be controlled by reducing the pollution intensity...