S V (Subu) Subramanian is a Professor of Population Health and Geography at Harvard University. He is the Principal Investigator of the Geographic Insights Lab based at the Harvard Center for Population and Development Studies. He has published over 950 articles, book chapters, and books in the broad field of population health and well-being and in applied multilevel statistical methods. His current research interests include developing and applying data science approaches for precision public policy in the context of health, nutrition and development;and understanding individual and population heterogeneity in health and well-being from a multilevel and cross-comparative perspective.