976 -0.22 0.118</span></span>
<span><span class="co">#&gt; 3       11      3     3 1976  0.23 0.144</span></span>
<span><span class="co">#&gt; 4       11      4     4 1976 -0.30 0.144</span></span>
<span><span class="co">#&gt; 5       12      1     5 1989  0.13 0.014</span></span>
<span><span class="co">#&gt; 6       12      2     6 1989 -0.26 0.014</span></span></code></pre></div>
<p>In the following analyses, we use the following variables:</p>
<ul>
<li>
<code>yi</code>, standardized mean differences,</li