Naoya Kishida Yokohama National University   Graduate School of International Social Sciences Yokohama National University 79-3, Tokiwadai, Hodogaya-ku Yokohama, Kanagawa 240-8501 Japan   kishida-naoya-hp@ynu.jp             JEL Areas: E5 : Monetary Policy, Central Banking, and the Supply of Money and Credit: General C5 : Econometric Modeling: General