I am a health economist at Brown University, where I am an Assistant Professor of Health Services, Policy, and Practice in the School of Public Health. I study health care markets using quasi-experimental methods and administrative data. My current work focuses on Medicare, prior authorization, and the use of AI in health care. My research has been published in leading economics and health policy journals, including the Journal of Health Economics, Health Affairs, and Health Services Research. I received my PhD in health economics and policy from Johns Hopkins University.
PhD in Health Economics and Policy, 2025
Johns Hopkins University
BA in Economics, 2018
Colgate University
Marr J., Meyers DJ., & Ryan AM. (2026) Pre-Claim Review And Traditional Medicare Home Health Spending: Evidence From 4 States.. Health Affairs.
Marr J., Trivedi AN., Meyers DJ. (2026) Prior Authorization In Medicare Advantage: Beneficiary Exposure And Plan Disenrollment In 2021. Health Affairs.
Marr J., Whaley C., Zhao X. (2026). From Payer to Provider: Impacts of Insurer Vertical Expansion into Physician Services. Working Paper.
Marr J. (2025). Algorithmic Decision-Making in Health Care: Evidence from Post-Acute Care in Medicare Advantage. Journal of Health Economics.