S (Subu) V Subramanian, PhD, is professor of population health and geography in the Department of Social and Behavioral Sciences at the Harvard T.H. Chan School of Public Health. His research focuses on understanding the role of geographic, spatial and institutional contexts (e.g., neighborhoods, schools, workplaces) in influencing population health; empirical multi-level examination of the pathways between macro socioeconomic environments (e.g., income inequality and social capital) and population health and health inequalities; and the methodological challenges to modeling causal contextual and neighborhood effects. Subramanian is PI of the Geographic Insights Lab based at the Harvard Pop Center. He is co-editor in chief of the international journal Social Science & Medicine.