The Unified Growth Theory attempts to explain economic growth in the long run within a single framework. Accordingly, it is expected that a successful unified theory is capable of modeling the transition among different economic regimes. In this study, after identifying the main features of the three growth regimes (Mathusian, post-Malthusian and sustained economic growth), we review two typical unified growth theories. While the Hansen-Prescott model seeks to explain how the transition occurred, the Galor-Weil model focuses on the causes and interrelatedness of the observed phenomena.

JEL classification: N10, O41