The aim of this paper is to estimate the sensitivity of the natural rate of growth to the actual rate of growth for 15 OECD countries over the period 1961 to 1995, on the hypothesis that the natural rate of growth is not exogenously given. To do this we estimate the natural rate of growth and,...

A country's growth of output is identically equal to its ratio of investment to output and the productivity of investment. In "new" growth theory regressions, which include the investment ratio, all other included variables pick up why the productivity of investment differs between countries....

This concise yet insightful sequel to the highly acclaimed The Nature of Economic Growth provides a comprehensive critique of both old and new growth theory, highlighting the importance of economic growth for reducing poverty. A.P. Thirlwall illustrates that orthodox growth theory continues to...