This study presents new estimates of the impact of social networks on attitudes and behavior in two areas, family planning and AIDS. The study explicitly allows for the possibility that social networks are not chosen randomly, but rather that important characteristics such as unobserved...

Understanding the determinants of individuals' perceptions of their risk of becoming infected with HIV and their perceptions of acceptable strategies of prevention is an essential step towards curtailing the spread of this disease. We focus in this paper on learning and decision-making about...