Public Health

Susan Busch
Professor of Public Health (Health Policy)

Professor Busch is a Professor of Public Health (Health Policy) and former chair of the Department of Health Policy and Management at the Yale School of Public Health. Professor Busch’s research examines the effects of policies and regulations on health care cost and quality. Most of her work focuses on behavioral health. Professor Busch’s work has been funded by the National Institute of Mental Health, the National Institute of Drug Abuse and the Robert Wood Johnson Foundation. She has an undergraduate degree from the University of Michigan, an S.M.

Xi Chen
Associate Professor, School of Public Health

Professor Chen is a health and development economist. He recently completed his Ph.D. in applied economics at Cornell. His research seeks to better understand how social interactions affect health behavior and outcomes, how socioeconomic status drives social competition. Most of his current work draws on primary data from China.

Curriculum Vitae

Ted Cohen
Professor of Epidemiology (Microbial Diseases)

Dr. Cohen is an infectious disease epidemiologist whose primary research focus is tuberculosis. He is particularly interested in understanding how TB drug-resistance and medical comorbidities such as HIV frustrate current efforts to control epidemics, with an ultimate goal of developing more effective approaches to limit the morbidity caused by this pathogen. Dr. Cohen’s training is in epidemiology and clinical medicine, and his work includes mathematical modeling, fieldwork, and analysis of programmatic data.

Abigail Friedman
Associate Professor of Public Health (Health Policy)

Abigail S. Friedman is an Associate Professor in the Department of Health Policy and Management at the Yale School of Public Health. Her research focuses on the policy determinants of tobacco use and disparities therein, with the overarching goal of informing and facilitating evidence-based policymaking to improve population health and reduce inequality. A health economist by training, she conducts work in three areas.

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ISPS Graduate Policy Fellow 2024

Kim Gannon (she/her) is a PhD Candidate in the Yale School of Public Health, Department of Health Policy and Management. Her research explores drug policy, particularly punitive policies passed as a reaction to the fentanyl-driven overdose crisis. Specifically, she studies the influence of public opinion on formation and implementation of these policies, as well as their unintended consequences on the health and well-being of people who use drugs, particularly in communities of color, once implemented.

ISPS Dahl Scholar, 2021-2022
Dahl Scholar, 2021 - 2022

As a Dahl scholar, Sarah works with Professor Xi Chen at the Yale School of Public Health to study the impacts of place of birth on long-term health outcomes. As a Tobin and Herb Scarf scholar, she has collaborated on other projects with Professor Chen that looked at the effects of Covid-19 on cognitive impairment. Previously, she has conducted research with the Yale Economic Growth Center on the effects of Covid-19 in developing countries and with a Washington D.C.-based think tank on U.S. maritime and agriculture policies. Sarah is passionate about reforming the U.S.

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