yusuphkulindwaj@yahoo.com
+255688002059
Department of Economics and statistics, Moshi Cooperative University
Tanzania
zhili@xmu.edu.cn
School of Economics and The Wang Yanan Institute for Studies in Economics B501
montrone@mcc-berlin.net
+49 (0) 30 338 5537 215
Mercator Research Institute on Global Commons and Climate Change (MCC)