Hideaki Sakawa Graduate School of Economics, Nagoya City University   1 Yamanohata, Mizuho-cho, Mizuho-ku Nagoya, Aichi 4678501 Japan   sakawa@econ.nagoya-cu.ac.jp             JEL Areas: G3 : Corporate Finance and Governance: General G1 : General Financial Markets: General (includes Measurement and Data)