1. Center for Emergency Care Policy & Research, Department of Emergency Medicine,Perelman School of Medicine, University of Pennsylvania, Philadelphia2Leonard Davis Institute of Health Economics, University of Pennsylvania, Philadelphia
2. Urban Institute, Washington, DC
3. Leonard Davis Institute of Health Economics, University of Pennsylvania, Philadelphia4Robert Wood Johnson Health and Society Scholars Program, University of Pennsylvania, Philadelphia
4. Center for Emergency Care Policy & Research, Department of Emergency Medicine,Perelman School of Medicine, University of Pennsylvania, Philadelphia
5. University of Chicago Survey Lab, University of Chicago, Chicago, Illinois
6. Leonard Davis Institute of Health Economics, University of Pennsylvania, Philadelphia6Department of General Internal Medicine,Perelman School of Medicine, University of Pennsylvania, Philadelphia