Intergenerational transfer patterns in sub-Saharan Africa are poorly understood, despite the alleged importance of support networks to ameliorate the complex implications of the HIV/AIDS epidemic on families. We estimate the age patterns and the multiple directions of transfer flows in rural...

Using life table measures, we compare educational differentials in all-cause mortality at ages 40 to 70 in Bulgaria to those in Finland and the United States. Specifically, we assess whether the relationship between education and mortality is modified by marital status. Although high education...

Unobserved differences in individual's susceptibility to death are an important aspect in the analysis of contemporary mortality patterns. However, observed mortality rates at adult and old ages, which are usually well-described by a Gompertz curve, are often perceived inconsistent with frailty...

We present life tables by single year of age and sex for groups of animals and for 42 individual mostly mammalian species. Data are derived from the International Species Information System. The survivorship of most of these species has never been mapped systematically. We demonstrate that, in...

In this paper we describe the Bulgarian statistical system that provides unique research possibilities for demographic analyses. In particular, we review the methodology, structure and informational flows for population registration and the registration of vital events in Bulgaria. In addition,...

Longitudinal household data can have considerable advantages over much more widely used cross-sectional data for capturing dynamic demographic relationships. Because the collection of longitudinal data may be difficult and expensive, analysts need to assess the magnitude of the particular...

Special Collection 1: Social Interactions and HIV/AIDS in Rural Africa is a set of papers stemming from the conference "Research on Demographic Aspects of HIV/AIDS in Rural Africa", held at the Population Studies Center, University of Pennsylvania, October 28, 2002. The aim of the conference was...

Empirical studies of the diffusion of modern methods of family planning have increasing incorporated social interaction within nonlinear models such as logits. But they have not considered the full implications of these nonlinear specifications. This paper considers the implications of using...

In this paper, we present a framework for considering whether the marginal social benefits of demographic and social science research on various health conditions in developing countries are likely to be relatively high. Based on this framework, we argue that the relative current and future...