*Chompunuch Nantajit¹, Nipon Poapongsakorn², Hermann Waibel³ (1. Faculty of economics, Ramkhamhaeng University, Thailand, 2. Thailand Development Research Institute, Thailand, 3. Gottfried Wilhelm Leibniz Universität Hannover, Germany)

*Han Zongchang¹ (1. School of Economics and Management, Huazhong Agricultural University)

*Ligao Bao¹, Motoi Kusadokoro², Atsushi Chitose² (1. Graduate School of Engineering, Tokyo University of Agriculture and Technology, 2. Institute of Agriculture, Tokyo University of Agriculture and Technology)

*Asami Takeda¹ (1. Aoyama Gakuin University)