Always a good reminder, I still see this error quite often: "The difference between significant and not significant is not itself significant. If you want to carry out inference for a difference, you need to construct the standard error for that difference." www.econometrics.blog/post/overlap...
Overlapping Confidence Intervals | econometrics.blog
Perhaps you’ve seen a claim like this in an applied paper: “the estimated effect for Group A is statistically significant, but the estimated effect for Group B is not; this treatment helps As but not ...
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