The econometric literature has been unable to establish a robust association between foreign aid and growth and poverty reduction. In this paper we argue that aid effectiveness must be assessed using methods that go beyond cross-country regressions. We calibrate a dynamic general equilibrium...

In this paper, we conduct an empirical study of the effect of uncertainty on fertility. The precautionary motive for saving predicts that an increase in uncertainty increases saving by reducing both consumption and fertility. We use a new measure of uncertainty, the World Uncertainty Index, and...

In this paper, we conduct an empirical study of how uncertainty alters fertility behavior. The precautionary motive for saving predicts that an increase in income uncertainty increases saving by reducing both consumption and fertility. We examine this prediction using a new measure of economic...

During the course of development, wages and labor productivity are much higher in the nonfarm sectors of the economy than in agriculture. In this paper, we examine the sources and consequences of wage and productivity gaps in the U.S. from 1800 to 2000. We build a quantitative general...