e</code>: a share of non-missing observations for a given
          day</p></li>
<li><p><code>rank_stat</code>: a rank test statistic</p></li>
<li><p><code>rank_signif</code>: a significance of the statistic</p></li>
</ul>

    <h2 class="hasAnchor" id="details"><a class="anchor" href="#details"></a>Details</h2>

    <p>This procedure uses ranks of abnormal returns to examine significance of each
day in the event window. In order to get ranks of corresponding abnormal
returns, the procedure uses regular R f