\newcommand{\CGrowDSGE}{
\Delta \log       \mathbf{C} _{t+1} & = & \varsigma + \chi %\mathbf{E} _{t-n}[
\Delta \log       \mathbf{C}_{t} % ]
 + \eta \mathbf{E} _{t}[\Delta \log       \mathbf{Y} _{t+1}] +
{\alpha} %\mathbf{E} _{t-n}[
{     A }_{t} %]
 }
