ot explain more than 7.63% of the residual variance of both the treatment and the outcome are not strong enough to bring the estimate to a range where it is no longer 'statistically different' from 0, at the significance level of alpha = 0.05.</span></span>
<span><span class="co">#&gt; </span></span>
<span><span class="co">#&gt; Bounds on omitted variable bias:</span></span>
<span><span class="co">#&gt; </span></span>
<span><span class="co">#&gt; --The table below shows the maximum strength of unobserved co