RDP 2002-06: Output Gaps in Real Time: are they Reliable Enough to use for Monetary Policy? Equation (4)

θ Z t = ∑ i=0 4 δ i Δ( y t−i − y t−i * )+ ∑ i=0 k η η i oil t−i + ∑ i=0 k ξ ξ i import t−i MathType@MTEF@5@5@+=feaagCart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLnhiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=xfr=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@7288@