Abstract:
HIV/AIDS, Health Behavior, and the Income Gradient: Evidence from South Africa

Title HIV/AIDS, Health Behavior, and the Income Gradient: Evidence from South Africa
Recipient

Margaret McMillan, Ph.D.
Associate Professor of Economics, Tufts University



Award Date 2004 - Fall

Abstract

Using individual and household-level survey data from the Africa Centre for Health and Populations Studies (AC), our research will examine the links between health behaviors and socio-economic status (SES), particularly income. The aim is to document whether household resources contribute to the health gradient – those observed positive correlation between health and wealth or other measures of SES – through better knowledge and awareness of HIV/AIDS, less risky sexual behavior and/or less participation in other behaviors damaging to health (such as tobacco use or heavy drinking). Primary research questions include: (1) What is the relationship between income and (a) number of sexual partners; (b) condom use; or (c) other health-related behavior such as smoking and drinking? (3) Which socio-economic factors other than income (such as schooling) are correlated with number of sexual partners and condom use? (3) To what extent do these relationships differ between men and women?

Understanding the health gradient is important for evaluating policies related to income support and targeting health interventions such as HIV/AIDS prevention and treatment in Africa. Yet few studies on causal mechanisms underlying the health gradient use individual or household-level date from developing countries. Our study is significant because it will help to fill this gap by exploring the two-way causality between adult health and household resources, focusing on health behaviors as one mechanism. The longer-term research goal is to study, in collaboration with the AC, the links between income and who comes for ARV treatment to follow the impact of ARV treatment on household outcomes and to e3xplore the relationship between prevention and treatment. The AC is likely to begin the rollout of ARV treatment sometime in 2005. Thus, our research is designed to complement the AC’s ongoing research work in HIV prevention and treatment. The rich longitudinal data available in the AC dataset means that our initial cross-sectional analysis of correlations between SES and health behaviors can be readily extended to longitudinal analysis of ARV roll-out in the survey area. We anticipate that this will be attractive for future outside funding, since the NIH states that “at present, the most effective way to prevent or reduce the spread of HIV/AIDS is through behavioral change….NIH will continue to sponsor research related to…..strengthening our understanding of the determinants, trends, and processes of HIV-related risk behaviors and the consequences of HIV infection”.