Dr. Stewart works as part of a team of researchers at Harvard University and the NBER developing a Satellite National Health Account for the United States. The overarching goal of this research is to measure the output of the health system in terms of quality-adjusted life expectancy. Stewart has been the lead analyst and author of publications on health assessment for this project, which have been featured in journals including Medical Care, the American Journal of Public Health, and the New England Journal of Medicine. Her work evaluates the importance of risk factors such as smoking, obesity, and socioeconomic status on population health and disability. Dr Stewart was formerly a postdoctoral research fellow at the University of California San Diego Health Outcomes Assessment Program. She earned her Ph.D. in Gerontology and Public Policy from the University of Southern California Andrus Gerontology School, and her undergraduate degree in Psychology from the University of Manitoba in Canada. Dr. Stewart is a member of the Harvard Center for Population and Development Studies, and served as an advisor to the Institute of Medicine’s Committee to Evaluate Measures of Health Benefits for Environmental, Health, and Safety Regulation, and the NIH Office of Behavioral and Social Sciences Research Review of Behavioral and Social Sciences Insights on Population Health.