Because individuals with HIV are more likely to fall into poverty, and the poor may be at higher risk of contracting HIV, simple estimates of the effect of HIV status on economic outcomes will tend to be biased. In this paper, we use two econometric methods based on the propensity score to...

This paper uses national household survey data to examine changes in real per capita incomes in South Africa between 1993 and 2008; the start and the end of the first fifteen years of post-apartheid South Africa. These data show an increase in average per capita real incomes across the distribution....

Recognizing that a credible estimate of a wage subsidy's impact requires a model of the labor market that itself generates high unemployment in equilibrium, we estimate a structural search model that incorporates both observed heterogeneity and measurement error in wages. Using the model to...

This paper tries to make sense of the recent trade dispute between the U.S. and Japan in autos and auto parts. The paper argues that there are structural differences between the way that the auto industries are organized in the U.S. and Japan, and that these differences have contributed to the...

We demonstrate how to estimate a model of product demand and oligopoly pricing when products are multi-dimensionally differentiated. We provide an empirical counterpart to recent theoretical work on product differentiation. Using specifications informed by economic theory, we simultaneously...

The spread of the HIV/AIDS epidemic is still fueled by ignorance in many parts of the world. Filling in knowledge gaps, particularly between men and women, is considered key to preventing future infections and to reducing female vulnerabilities to the disease. However, such knowledge is arguably...

We document the rise in unemployment in South Africa since the transition in 1994. We describe the likely causes of this increase and analyze whether the increase in unemployment is due to structural changes in the economy (resulting in a new equilibrium unemployment rate) or to negative shocks...

This paper develops new techniques for empirically analyzing demand and supply in differentiated products markets and then applies these techniques to analyze equilibrium in the U.S. automobile industry. Our primary goal is to present a framework which enables one to obtain estimates of demand...

We estimate the returns to internal migration in South Africa. These appear to be the first nationally representative estimates of the return to migration for any African country-- a somewhat surprising claim for a literature that's over 60 years old. We develop a framework to analyze individual...

In this paper we develop some simple models of optimal tax and tariff policy in the presence of global corporations that operate in an imperfectly competitive environment. The models emphasize two important differences in the practical application of tax and tariff policy - tax, but not tariff,...