span class="fu"><a href="https://rdrr.io/r/utils/head.html" class="external-link">head</a></span><span class="op">(</span><span class="va">income_merged</span><span class="op">)</span></span></span>
<span class="r-out co"><span class="r-pr">#&gt;</span>   INCGHH_A INCGHH_B</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> 1        3    NA(c)</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> 2        3    NA(c)</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> 3        6  