an class="r-in"><span><span class="fu">did_means</span><span class="op">(</span><span class="va">y</span><span class="op">+</span><span class="va">x1</span><span class="op">+</span><span class="va">period</span><span class="op">~</span><span class="va">treat</span><span class="op">|</span><span class="va">post</span>, <span class="va">base_did</span><span class="op">)</span></span></span>
<span class="r-out co"><span class="r-pr">#&gt;</span>           vars    cond: 1     cond: 0 Difference t-stat     cond: