es (Horvitz &amp; Tuljapurkar, 2008). This
mathematical artefact can introduce bias into measures obtained using
age-from-stage methods. <code>Rage</code> provides a convenient and
principled way of correcting for this artefact by imposing a lower
probability threshold defined by the degree of convergence to the
quasi-stationary distribution (see ). We suggest that users filter out
from their analyses matrices that do not pass this threshold
criterion.</p>
<p>Users should also be aware of the issue of censu