 is usually helpful to have
informative or at least weakly informative priors for all parameters;
see the <a href="regression-priors-section.html#regression-priors.section">regression priors section</a> for
recommendations on priors for regression coefficients and scales.</p>
<div id="optimizing-the-model" class="section level4 unnumbered">
<h4>Optimizing the Model</h4>
<p>Where possible, vectorizing sampling statements leads to faster log
probability and derivative evaluations. The speed boost is not
becau