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MP曲線 
(日銀の金融政策を表す) 
IS曲線 
(日本経済の動きを表す) 
ゼロ下限制約伝統的金融政策: 
GDP 
予 
想 
実 
質 
金 
利 
図1:IS-MPモデルと伝統的・非伝統的金融政策 
非伝統的金融政策: 
政策金利がほぼゼロになるという 
「ゼロ下限制約」に抵触し、非伝統 
的金融政策が必要な領域 
政策金利の操作を通じた伝 
統的金融政策が可能な領域
図2:なぜ現在の日本で伝統的金融政策は無効か? 
MP曲線 
(日銀の金融政策) 
IS曲線1 
(かつての日本経済) 
GDP 
失われた20年 
現在の日本では伝統的 
金融政策は無効 
予 
想 
実 
質 
金 
利 
金融緩和 
(伝統的金融政策) 
IS曲線2 
(現在の日本経済) 
伝統的金融政策による 
景気刺激効果(かつての効果)
図3:なぜ異次元緩和(非伝統的金融政策)は機能? 
IS曲線2 
(現在の日本経済) 
MP曲線 
(日銀の金融政策) 
GDP 
予 
想 
実 
質 
金 
利 
異次元緩和1 
異次元緩和1(非伝統的金融政策)による景気刺激効果 
(アベノミクスではさらに機動的な財政政策を併用)
図4:なぜアベノミクス(2014年4月以前)は機能? 
IS曲線2 
(現在の日本経済) 
MP曲線 
(日銀の金融政策) 
GDP 
予 
想 
実 
質 
金 
利 
財政政策 
異次元緩和1 
異次元緩和(非伝統的金融政策)と財政政策の組み合わ 
せで、2014年4月までは順調な景気回復が実現
図5:なぜ消費増税が経済に大きく悪影響するのか? 
MP曲線 
(日銀の金融政策) 
GDP 
予 
想 
実 
質 
金 
利 
矢印(2):2014年4月消費増税での 
景気悪化(より大きな悪影響) 
矢印(1):かつての消費増税 
による景気悪化 
IS曲線1 
(かつての日本経済) 
IS曲線2 
(現在の日本経済) 
消費増税による 
景気悪化(1989年4月) 
消費増税による 
景気悪化(2014年4月)
図6:2014年10月の異次元緩和2は効果があるのか? 
MP曲線 
(日銀の金融政策) 
GDP 
予 
想 
実 
質金 
利 
IS曲線2 
(現在の日本経済) 
異次元緩和2 
消費増税による 
景気悪化 
異次元緩和2も景気刺激効果はあるが、異次元緩和1に 
比較すれば効果はやや小さい
結語 
• 以下のように第47回衆議院総選挙後の新 
政権に提言したい 
1. 今後もデフレ脱却に向けて非伝統的金融政 
策と財政政策(消費税延期・減税・給付 
金・公共投資)を維持すること 
2. また、今後提出される消費増税法案にも景 
気条項をつけ、景気回復が思わしくない場 
合は再度延期できるように準備をしておく 
こと

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Is mp qqe-consumption_tax_2014_12_08