argument to calculate average “marginal effects for representative cases” (MERs). MEMs could be obtained by manually specifying <code>at</code> for every variable in a way that respects the variables classes and inherent meaning of the data, but that functionality is not demonstrated here.</p>
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<div id="using-the-at-argument" class="section level3">
<h3 class="hasAnchor">
<a href="#using-the-at-argument" class="anchor"></a>Using the <code>at</code> Argument</h3>
<p>The <code>at</code> argument all