ariable name.</p></dd>
<dt>cvar</dt>
<dd><p>A character vector of length &gt; 0. Covariate names. Use <code>NULL</code> if there is no covariate. However, this is a highly suspicious situation. Even if <code>avar</code> is randomized, <code>mvar</code> is not. Thus, there are usually some confounder(s) to account for the common cause structure (confounding) between <code>mvar</code> and <code>yvar</code>.</p></dd>
<dt>emm_ac_yreg</dt>
<dd><p>A character vector of length &gt; 0. Effect modifiers names. The c