someone with a particular combination of states and risk factors (= someone in a particular state in the expanded model).</p>
<p>This kind of model can be tricky to deal with due to the large number of parameters - see e.g. <a href="https://doi.org/10.1002/sim.4429">Tom and Farewell</a>.</p>
<p>For identifiability / interpretability, may need to constrain some parameters to equal each other using the <code>qconstraint</code> option to <code>msm()</code></p>
<ul>
<li>e.g. we might assume the state of damag