ependent intensities, e.g. </p>
<ul>
<li><p>models with a second covariate, whose effect is different within each time period? i.e. a time/covariate interaction.</p></li>
<li><p>models where the time period affects some transition intensities but not others?</p></li>
</ul>
<ol style="list-style-type: decimal">
<li><p><strong>Construct the expanded dataset</strong></p>
<p>Fit a standard <code>pci</code> model, then use <code>model.frame()</code> to extract the expanded dataset constructed by <code>msm</cod