1. PhD Researcher, International Centre for Integrated assessment and Sustainable development (ICIS), Maastricht University, P.O. Box 616, 6200 MD Maastricht, the Netherlands.
2. Lecturer, Department of Sociology and Anthropology, Faculty of Social Sciences, Semarang State University, Kampus Unnes Semarang 50229, Indonesia.
3. Professor, International Centre for Integrated assessment and Sustainable development (ICIS), Maastricht University, P.O. Box 616, 6200 MD Maastricht, the Netherlands.
4. Member of Scientific Board, Indonesian Coffee and Cocoa Research Institute (ICCRI), Jember 68118, Indonesia.