We use unique data to estimate the determinants of cognitive ability among 14 to 17 year olds in Senegal. Unlike standard school-based samples, tests were administered to current students as well as to children no longer - or never - enrolled. Years of schooling strongly affects cognitive...

This paper substantiates two claims - that Africa is poor compared to the rest of the world and that poverty in Africa is not declining consistently or significantly, in contrast to other regions of the world. We consider poverty in the dimensions of health and education, in addition to income,...

Using over 70 nationally representative surveys, I find evidence of a dramatic increase in the share of women who are overweight in developing and transition economies, especially in Latin America and the Middle East. Urban rates of overweight, measured by the body mass index, are also far...

Repeated rounds of nationally representative surveys are an important source of information on changes in the welfare of the population. In particular, policymakers and donors in many developing countries rely heavily on the Demographic and Health Surveys (DHS) to provide information on levels...

We use repeated rounds of Demographic and Health Survey data from eight African countries to examine changes in and determinants of three HIV risk behaviors: age at first intercourse; number of current sexual partners, and use of condoms. As a prelude, we assess the within- country comparability...