We study social interactions in the risky behavior of best-friend pairs in the National Longitudinal Study of Adolescent Health (Add Health). Focusing on friends who had not yet initiated a particular behavior (sex, smoking, marijuana use, truancy) by the first wave of the survey, we estimate...

Prevention of mother-to-child transmission of HIV (PMTCT) is the single most effective HIV prevention intervention in practice today. Nonetheless, little reliable empirical evidence exists on the behavioral effects of PMTCT. This paper documents the rapid expansion of access to PMTCT in Zambia...

Eleven percent of the Malawian population is HIV infected. Eighteen percent of sexual encounters are casual. A condom is used one quarter of the time. A choice-theoretic general equilibrium search model is constructed to analyze the Malawian epidemic. In the developed framework, people select...

Parental involvement (PI) laws require that physicians notify or obtain consent from a parent(s) of a minor seeking an abortion before performing the procedure. Several studies suggest that PI laws curb risky sexual behavior because teens realize that they would be compelled to discuss a...

Powerful currents have reshaped the structure of families over the last century. There has been (i) a dramatic drop in fertility and greater parental investment in children; (ii) a rise in married female labor-force participation; (iii) a significant decline in marriage and a rise in divorce; (iv)...

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 study the behavioral changes due to marijuana consumption on fertility and its key mechanisms, as opposed to physiological changes. We can employ several large proprietary data sets, including the 1997 National Longitudinal Survey of Youth, Nielsen Retail Scanner database, as well as the...

Economic growth and development have improved human health in many regions, while sub-Saharan Africa continues to lag behind. Economic theory and the existing empirical evidence suggest that development may not generate large reductions in the leading cause of adult mortality in the region,...

We examine the empirical relationship between socioeconomic disadvantage and rates of early childbearing. First, we use data from the Panel Study of Income Dynamics (PSID) to confirm a strong correlation at the individual level - women who grow up quot;disadvantagedquot; are much more likely to...

The response of sexual behavior to HIV in Africa is an important input to predicting the path of the epidemic and to focusing prevention efforts. Existing estimates suggest limited behavioral response, but fail to take into account possible differences across individuals. A simple model of...