Dylan Small is the Class of 1965 Wharton Professor of Statistics at Department of Statistics, The Wharton School, University of Pennsylvania. He is also the Associate Scholar, Biostatistics Unit, Center for Clinical Epidemiology and Biostatistics, University of Pennsylvania School of Medicine. His research interests include Causal inference, Design and analysis of observational studies, design and analysis of experiments, Applications of statistics to public health, medicine and public policy. He serves (Co-)Editor for Journal of the American Statistical Association and Observational Studies, and Associate Editor for Annals of Statistics and Journal of Causal Inference, etc.