Alaka Basu is Senior Research Associate in the Division of Nutritional Sciences at Cornell University. She has previously held positions at the University of Bombay; The Population Foundation of India; the National Council of Applied Economic Research, New Delhi; and the Institute of Economic Growth, New Delhi. Peter Aaby is Research Professor in Health Conditions in Developing Countries in the Department of Epidemiology at the University of Copenhagen. He also works as Senior Researcher and Project leader of the Community Studies of Infectious Diseases and Primary Health Care in Guinea...