The Neoclassical Growth Model

Economic Development, Technological Change, and Growth

Article

In the Harrod-Domar growth model, steady-state growth was unstable. In the popular term of the day, it was a "knife-edge" in the sense that any deviation from that path would result in a further move away from that path. However, Robert M. Solow (1956), Trevor Swan (1956) and, a bit later, James E. Meade (1961) contested this conclusion. They claimed that the capital-output ratio of the Harrod-Domar model should not be regarded as exogenous. In fact, they proposed a growth model where the capital-output ratio, v, was precisely the adjusting variable that would lead a system back to its steady-state growth path, i.e. that v would move to bring s/v into equality with the natural rate of growth (n). The resulting model has become famously known as the "Solow-Swan" or simply the "Neoclassical" growth model.