New security designs, improvements in computer telecommunications technology and advances in the theory of finance have led to revolutionary changes in the structure of financial markets and institutions. This paper provides a functional perspective on the dynamics of institutional change and...

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...

How persistent are cultural traits? This paper uses data on anti-Semitism in Germany and finds continuity at the local level over more than half a millennium. When the Black Death hit Europe in 1348-50, killing between one third and one half of the population, its cause was unknown. Many...