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Takao FUJII, Kazuki HIRAGA, Masafumi KOZUKA. Analyses of Public Investment Shock in Japan: Factor Augmented Vector Autoregressive Approach. 慶應義塾大学グローバルCOEプログラム ディスカッションペーパー. 2012. 2012-006
Masafumi KOZUKA. Consumer behavior in Japan and its structural change: Re-examination by sup-predictive test. Kobe University Research Institute for Economics & Business Administration Discussion Paper Series. 2006. 183