;RMSE;R-squared "HP filtered WEO data";"HP filtered WEO data" "(λ = 100)";"(λ = 6.25)";"(λ = 100)";"(λ = 6.25)" "Observed WEO data";2.11;2.25;0.47;0.40 "Observed OECD data";1.10;1.47;0.72;0.51