University of New South Wales (UNSW) - ARC Centre of Excellence in Population Ageing Research (CEPAR), Duke University - Duke Global Health Institute, Saudi Health Council - General Directorate for National Health Economics and Policy, World Bank - Health, Nutrition and Population Global Practice, Saudi Health Council - General Directorate for National Health Economics and Policy, World Bank - Health, Nutrition and Population Global Practice, World Bank - Health, Nutrition and Population Global Practice, Duke University - Duke Global Health Institute, National University of Singapore (NUS) - Yale-NUS College, World Bank - Health, Nutrition and Population Global Practice, Saudi Health Council - General Directorate for National Health Economics and Policy, Saudi Health Council - General Directorate for National Health Economics and Policy, World Bank - Health, Nutrition and Population Global Practice and Duke University - Duke Global Health Institute

- Department of Agricultural & Resource Economics, affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN, World Bank, World Bank - Health, Nutrition and Population Global Practice and Government of the United States of America - Argonne National Laboratory