Dr. Hatfield is an Associate Professor of Health Care Policy (Biostatistics) at Harvard Medical School's Department of Health Care Policy. Her methods research centers on trade-offs among multiple outcomes, with an emphasis on hierarchical Bayesian modeling, and causal inference with observational data, particularly difference-in-differences designs. She is faculty co-director of the Health Policy Data Science Lab and co-PI of the Methods Core of the Healthcare Markets and Regulation Lab. Recent honors include the 2018 ISPOR Health Economics and Outcomes Research - Methodology award for her paper on incorporating loss functions in safety surveillance decisions. Dr. Hatfield is the 2019 Chair-Elect of the Health Policy Statistics Section of the American Statistical Association and is serving a three-year term on ENAR's Regional Committee (RECOM). Dr. Hatfield earned her BS in genetics from Iowa State University and her MS and PhD in biostatistics from the University of Minnesota.