\begin{equation}
\tShkAll _{t+n}=
\begin{cases}
 0\phantom{_{t+1}/\pNotZero} & \text{with probability $\pZero>0$} \\
 \tShkEmp_{t+n}/\pNotZero      & \text{with probability $\pNotZero \equiv (1-\pZero) $}
\end{cases} \label{eq:tShkDef}
\end{equation}
