o be performed. [Sorry for the jargon that follows.]
By default a unique adjustment is made, of the form G_min/(G_min-1) with G_min the
smallest G_i. If <code>G.df="conventional"</code> then the i-th "sandwich" matrix is adjusted
with G_i/(G_i-1) with G_i the number of unique clusters.</p></dd>


<dt id="arg-t-df">t.df<a class="anchor" aria-label="anchor" href="#arg-t-df"></a></dt>
<dd><p>Either "conventional", "min" (default) or an integer scalar. Only relevant when
the variance-covariance matrix is cluste