Institution: | (1) Present address: Faculty of Management, Senshu University, Ikuta, Tama-ku, Kawasaki-shi, 214 Kanagawa-ken, Japan;(2) Institute of Socio-Economic Planning, University of Tsukuba, Sakura-mura, Niihari-gun, 305 Ibaraki-ken, Japan;(3) Present address: Cowles Foundation for Research in Economics, Yale University, Yale Station, 06520 New Haven, CT, USA |