1. College of Public Administration, Nanjing Agricultural University, Nanjing 210095, China
2. Department of Economic and Rural Development, Gembloux Agro-Bio Tech, University of Liège, 4000 Liege, Belgium
3. Department of Engineering Management, University of Antwerp, Prinsstraat 13, 2000 Antwerp, Belgium
4. Institute of Agricultural and Environmental Sciences, Rural Economics, Estonian University of Life Sciences, 51014 Tartu, Estonia
5. Department of Ecological Engineering and Forest Hydrology, Faculty of Forestry, University of Agriculture in Krakow, al. 29 Listopada 46, 31-425 Krakow, Poland
6. Institute of Hydraulic Engineering, Vytautas Magnus University Agriculture Academy, 53361 Kaunas, Lithuania