Competition and Growth in a Vintage Knowledge Model

This paper models the relationship between growth, technology-lifetime, entry, and competition in a vintage-knowledge model of endogenous growth and perfect competition. The model has a unique steady state REE equilibrium. Variations of R&D-efficiency lead to a negative relation between growth and vintage-lifetime and indicate a non-monotonic relation between growth and competition. A shift of population size and its growth rates have qualitatively different consequences here than in standard models. The extent of entry constitutes a buffer, neutralizing the effect of population size or population growth rates on per-capita income levels and growth rates.