というNBER論文が上がっている。原題は「It’s Baaack: The Surge in Inflation in the 2020s and the Return of the Non-Linear Phillips Curve」で、著者はPierpaolo Benigno(ベルン大)、Gauti B. Eggertsson(ブラウン大)。 以下はその要旨。 This paper proposes a non-linear New Keynesian Phillips curve (Inv-L NK Phillips Curve) to explain the surge of inflation in the 2020s. Economic slack is measured as firms' job vacancies over the number of unemployed