The discrete-time Ramsey model with a decreasing population growth rate: stability and speed of convergence
by Juan Gabriel Brida; Gastón Cayssials; Juan Sebastián Pereyra
International Journal of Dynamical Systems and Differential Equations (IJDSDE), Vol. 6, No. 3, 2016

Abstract: This paper studies an extension of the Ramsey growth model of optimal capital accumulation in discrete time by departing from the standard assumption of constant population growth rate. More concretely, this rate is assumed to be decreasing over time and a general population growth law with this characteristic is introduced. In this setup, the model can be represented by a three-dimensional dynamical system, which admits a unique solution characterised by the Euler equation. It is shown that there is a unique non-trivial equilibrium, which is a saddle point. In addition, the speed of convergence to the steady state is characterised.

Online publication date: Fri, 09-Sep-2016

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