Jason N Doctor1, Marco D Huesch2, Daniella Meeker3. 1. Department of Pharmaceutical Health and Economics, Schaeffer Center for Health Policy and Economics, University of Southern California, 635 Downey Way, Los Angeles, CA 90089-3333, USA. Electronic address: jdoctor@usc.edu. 2. Sol Price School of Public Policy, Schaeffer Center for Health Policy and Economics, University of Southern California, 635 Downey Way, Los Angeles, CA 90089-3333, USA. 3. Department of Preventive Medicine, University of Southern California, 1450 Biggy Street, Building #288, Los Angeles, CA 90033, USA.