ch <span class="op">=</span> <span class="fl">2</span><span class="op">)</span></span></span>
<span class="r-in"><span></span></span>
<span class="r-in"><span><span class="va">est</span> <span class="op">=</span> <span class="fu"><a href="feols.html">feols</a></span><span class="op">(</span><span class="va">y</span> <span class="op">~</span> <span class="va">x</span> <span class="op">|</span> <span class="va">fe1</span> <span class="op">+</span> <span class="va">fe2</span>, <span class="va">base</span><span