Hiroaki Ino School of Economics, Kwansei Gakuin University   1-155 Uegahara Ichiban-cho Nishinomiya, Hyogo 662-8501 Japan   hiroakiino@04.alumni.u-tokyo.ac.jp   https://sites.google.com/site/inohiroaki/           JEL Areas: L0 : Industrial Organization: General Q0 : Agricultural and Natural Resource Economics; Environmental and Ecological Economics: General