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KDI 경제교육·정보센터

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  • 경제배움
  • Economic

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    and Education

    Center

최신자료
Unobservable No More: Estimating the Natural Rate of Interest under Flat IS and Phillips Curves
CEPR
2026.04.02
We show that the Laubach and Williams (2003) model and its variants in Holston, Laubach and Williams (2017, 2023) cannot estimate the natural rate with finite precision when either the IS curve or the Phillips curve are flat. To solve this unobservability, we propose a simple augmented model with a mean-reverting interest rate gap that considerably narrows the natural rate‘s confidence bands in those empirically relevant situations. We also assess the ability of the corporate risk premium and the share of working age population to explain movements in the natural rate, but they generate filtered estimates that fluctuate too much.