Vintage Capital and the Dynamics of the AK Model

This paper analyzes the equilibrium dyamics of an AK-type endogenous growth model with vintage capital. The inclusion of vintage capital leads to oscillatory dynamics governed by replacement echoes, with additionally influence the intercept of the balanced growth path. These features, which are in sharp contast to those from the standard AK model, can contribute to explaining the short-run deviations observed between investment and growth rates time series. To characterize the convergence properties and the dynamics of the model we develop analytical and numerical methods that should be of interest for the general resolution of endogenous growth models with vintage capital.