
<code><a href="reference/mdffits.default.html">mdffits()</a></code> calculates MDFFITS, a multivariate version of the DFFITS statistic, which is also a measure of the difference in fixed effects.</li>
<li>
<code><a href="reference/covratio.default.html">covtrace()</a></code> calculates covariance trace, the ratio between the covariance matrices with and without unit <em>i</em> to the identity matrix.</li>
<li>
<code><a href="reference/covratio.default.html">covratio()</a></code> calculate covariance ratio,