AIDS 2017 07;31(12):1765-1769
aCenter for Health Policy and the Center for Primary Care and Outcomes Research, Stanford University, Stanford, California bNational Bureau of Economic Research, Cambridge, Massachusetts cNegotiation, Organizations & Markets Unit, Harvard Business School, Boston, Massachusetts dDivision of Infectious Diseases, Department of Medicine, Emory University School of Medicine, Atlanta, Georgia eSchool of Management, Yale University, New Haven, Connecticut fHarvard Kennedy School, Harvard University, Cambridge, Massachusetts gDepartment of Global Health, Rollins School of Public Health, Emory University, Atlanta, Georgia hDepartment of Economics, Harvard University, Cambridge, Massachusetts.