\begin{equation*} \ifnumber
\mathbf{k}_{t+1,i}  =
\begin{cases}
                         0                       & \text{if agent at $i$ dies, is replaced by a newborn}
\\ \mathbf{a}_{t,i}\MicroDepr{\daleth}{} /\Omega & \text{if agent at $i$ survives}
\end{cases} \label{eq:tontine}
\end{equation*}
