1. Sol Price School of Public Policy, University of Southern California, Los Angeles
2. Leonard D. Schaeffer Center for Health Policy and Economics, University of Southern California, Los Angeles
3. Cardiology Division, Department of Medicine, Massachusetts General Hospital, Boston
4. Harvard Medical School, Boston, Massachusetts
5. Devoted Health Inc, Waltham, Massachusetts
6. Department of Health Care Policy, Harvard Medical School, Boston, Massachusetts
7. Massachusetts General Hospital, Boston
8. National Bureau of Economic Research, Cambridge, Massachusetts