class="st">"deviance"</span>, <span class="st">"pearson"</span>,</span>
<span>    <span class="st">"partial"</span>, <span class="st">"stage1"</span><span class="op">)</span>,</span>
<span>  <span class="va">...</span></span>
<span><span class="op">)</span></span>
<span></span>
<span><span class="co"># S3 method for ivreg</span></span>
<span><span class="fu">Effect</span><span class="op">(</span><span class="va">focal.predictors</span>, <span class="va">mod</span>, <span class="va">...</span><span class="op