1. Department of Agricultural Economics; Purdue University; 403 W. State St West Lafayette IN 47907 USA
2. International Rice Research Institute; House No. 9, Road 2/2 Chairman Bari Dhaka 1213 Bangladesh
3. Social Sciences Division, International Rice Research Instititute; DAPO 7777 Metro Manila 1301 Philippines
4. BRAC; 75, Mohakhali Dhaka 1212 Bangladesh