[備忘録][経済] 不連続的差異論とその他http://www.google.co.jp/search?q=cache:GFwBjmjF_zEJ:www.21ppi.org/japanese/thesis/200112/p14_22.pdf+%E4%B8%8D%E9%80%A3%E7%B6%9A%E7%9A%84%E5%B7%AE%E7%95%B0%E8%AB%96&hl=ja&ie=UTF-8&inlang=ja http://e-lib.…