1. Office of the Chief Economist; European Bank for Reconstruction and Development; One Exchange Square; London; EC2A 2JN; United Kingdom
2. Department of Agricultural Economics and Rural Development; Georg-August-University of Goettingen; Platz der Goettinger Sieben 5; 37073; Goettingen; Germany
3. International Food Policy Research Institute; 2033 K Street, NW; Washington; DC; 20006-1002; USA