We examine differential progress on health Millennium Development Goals (MDGs) between the poor and the better off within countries. Our findings are based on an original analysis of 235 DHS and MICS surveys spanning 64 developing countries over the 1990–2011 period. We track five health...

Understanding the determinants of men’s extramarital sexual relations, which account for a relevant share of concurrent sexual partnerships, is an important research subject. This article focuses on examining how married men’s behavior is influenced by the fidelity norm. Using...

Testing is a potentially important intervention to slow the HIV epidemic in Africa and elsewhere. Some countries in Africa have achieved high levels of testing but most have not. Cost, price, and questions of confidentiality have limited the expansion of testing. It looks possible, however, that...

We examine the relationship between sexual activities and happiness using a sample of 3800 adults from China. We provide some results about the relationship between sexual activities and happiness for an important country other than the United States. We find that those who have more sex and...

Objective: To examine how age at first vaginal intercourse is related to the circumstances of sex and specifically to the nature of the relationship between the partners, levels of autonomy, planning and regret. To quantify the contribution of age at first sex relative to the context and...