The Keynesian intuition that increasing consumption can stimulate investment is verified empirically using US macroeconomic data. The investment multiplier is hypothesized to increase monotonically with the propensity to consume. However, the functional relationship is not that of the Keynesian...

This essay reviews the development of neoclassical growth theory, a unified theory of aggregate economic phenomena that was first used to study business cycles and aggregate labor supply. Subsequently, the theory has been used to understand asset pricing, growth miracles and disasters, monetary...