RDP 2008-10: Solving Linear Rational Expectations Models with Predictable Structural Changes Equation (18)

\begin{array}{l} y_{t} = {\bar{S}}_{0} + {\bar{S}}_{1} y_{t - 1} + {\bar{S}}_{2} ε_{t} + {\bar{S}}_{y} {IE}_{t} \sum_{j = 1}^{\infty} {\bar{M}}^{j - 1} {\bar{Ω}}_{22}^{- 1} {\bar{Q}}_{2} \bar{Ψ} ε_{t + j} & t \geq T + 1 \end{array}