"https://rdrr.io/r/base/attach.html" class="external-link">attach</a></span><span class="op">(</span><span class="va">MEPS2001</span><span class="op">)</span></span></span>
<span class="r-msg co"><span class="r-pr">#&gt;</span> The following objects are masked from MEPS2001 (pos = 3):</span>
<span class="r-msg co"><span class="r-pr">#&gt;</span> </span>
<span class="r-msg co"><span class="r-pr">#&gt;</span>     age, age2, agefem, ambexp, blhisp, dambexp, dhospexp, educ,</span>
<span class="r-msg co"><span c