1. Center for Environmental Systems Research (CESR)University of Kassel Kassel Germany
2. Environment and Production Technology DivisionInternational Food and Policy Research Institute (IFPRI) Washington DC USA
3. Agriculture and Food, Commonwealth Scientific and Industrial Research Organisation St Lucia QLD Australia
4. Centre for Ecological Economics and Natural ResourcesInstitute for Social and Economic Change Bangalore India
5. Leibniz Centre for Agriculture Landscape Research Muencheberg Germany