Dr. Sze Yan (Sam) Liu received her PhD in Epidemiology from Brown University. She joined the Department of Public Health from her position as a research scientist at the New York City Department of Health and Mental Hygiene. Prior to that, she was a Kellogg post-doctoral Fellow in Health Disparities at Harvard University and a research associate at the Harvard University Center for Population and Development Studies. Professor Liu has published her research in highly regarded Public Health journals. Her scholarship focuses on the impact of social policies on health disparities, including research on the causal effect of law-enforcement-related violence on emergency department use in New York State, the association of structural racism and maternal morbidity, and the risk of hospitalization among low birthweight infants enrolled in different versions of Medicaid.