One in five Zambian children lives with an HIV/AIDS-infected adult. We estimate the effect that the availability of adult antiretroviral therapy (ART) has on the health of such children. Using a triple difference specification, we find that adult access to ART resulted in increased...

The most desirable Kenyan secondary schools are elite government schools that admit the best students from across the country. We exploit the random variation generated by the centralized school admissions process in a regression discontinuity design to obtain causal estimates of the effects of...

Medicare for seniors has been evolving for half a century and has performed very satisfactorily. Extending Medicare to cover everyone regardless of age would have several advantages. It would provide automatic coverage and portability for everyone regardless of employment, health status, income,...

Charitable foundations should endeavor to allocate their limited resources to best serve their constituents. However, few foundations use mathematical programming techniques despite overwhelming evidence of their superiority at selecting projects that yield higher levels of total benefits. The...

: A recent Census Bureau report shows that the gender earnings ratio for year-round full-time workers varies substantially across states, with a range of 24 percentage points. In this paper, I examine this variation by estimating state-fixed effect models of earnings for men and women, using...

The benefits of school choice systems designed to help disadvantaged groups might be hindered by information asymmetries. Kenyan elite secondary schools admit students from the entire country based on a national test score, district quotas, and stated school choices. We find even the highest...

We identify a representative sample of U.S. diabetes patients with comorbid hypertension and evaluate health care expenditures in this population across BMI strata. The underlying hypothesis is that the presence of comorbid obesity and hypertension poses an additional burden on patients with...

Colonial Americans complained that gold and silver coins (specie) were chronically scarce. These coins could be acquired only through importation. Given unrestricted trade in specie, market arbitrage should have eliminated chronic scarcity. A model of efficient barter and local inside money is...

We examine the impact of the Kenyan Free Primary Education program on student participation, sorting, and achievement on the primary school exit examination. Exploiting variation in pre-program dropout rates between districts, we find that the program increased the number of students who...

Using GMM models on a panel data of fifty-three countries, we examine whether stronger foreign IPR protection stimulates international transactions of U.S. multinational firms. The empirical results suggest that foreign countries that strengthen their IPR protection, especially those with strong...