1. Department of International Health, Johns Hopkins Bloomberg School of Public Health , 615 N. Wolfe St., Baltimore, MD 21205, United States
2. World Bank , 1818 H Street, NW Washington, DC 20433, United States
3. Inter-American Development Bank , 1300 New York Avenue NW, Washington, DC 20577, United States
4. Stockholm University, Institute for International Economic Studies , Universitetsvägen 10A, Stockholm 114 18, Sweden
5. World Bank , Rue Washington, Abidjan, Côte d’Ivoire
6. Centre for Economic Demography and Department of Economic History, Lund University School of Economics and Management , Scheelevägen 15B, Lund 223 63, Sweden