Daisuke Mori Kumamoto University, Faculty of Law   2-40-1 Kurokami, Chuou-ku Kumamoto University, Faculty of Law Kumamoto-shi, Kumamoto 860-8555 Japan   mdai@kumamoto-u.ac.jp             JEL Areas: K : Law and Economics K4 : Legal Procedure, the Legal System, and Illegal Behavior: General