Vitamin A deficiency is a major health problem in Africa and in many other developing countries. Biofortified staple crops that are high in pro-vitamin A have the potential to reduce the prevalence of vitamin A deficiency. Using a choice experiment with the real product in Uganda, we quantify...

While purchasing power parity (PPP) between countries has received a great deal of attention, PPP calculations within countries have received less attention. The idea that one unit of currency has the same purchasing power in all regions in large countries is false. This paper addresses this...