1. University of Groningen; P.O. Box 800, NL-9700 AV Groningen The Netherlands
2. Xi'an Jiaotong - Liverpool University; BB424, Business Building, No. 111 Ren'ai Road, Dushu Lake Higher Education Town SIP Suzhou 215123 China
3. Utrecht University
4. The Ohio State University; Department of Agricultural; Environment and Development Economics; 336 Agricultural Administration Building, 2120 Fyffe Road Columbus OH 43210