<p>My question did not provoke much interest but I am still deeply annoyed by the current situation. </p>

<p><strong>Here is what seems to me would be a better arrangement:</strong></p>

<ol>
<li><p><a href="https://stats.stackexchange.com/questions/tagged/random-eff-econometrics" class="post-tag" title="show questions tagged &#39;random-eff-econometrics&#39;" rel="tag">random-eff-econometrics</a><br>For questions about "random effects model" in econometrics. This means a model with random intercepts which is estimated with FGLS.</p></li>
<li><p><a href="https://stats.stackexchange.com/questions/tagged/fixed-eff-econometrics" class="post-tag" title="show questions tagged &#39;fixed-eff-econometrics&#39;" rel="tag">fixed-eff-econometrics</a><br>For questions about "fixed effects model" in econometrics. This actually means a simple linear model, but usually it is of a particular form and is estimated in a particular way.</p></li>
<li><p><a href="https://stats.stackexchange.com/questions/tagged/random-eff-in-mixed-model" class="post-tag" title="show questions tagged &#39;random-eff-in-mixed-model&#39;" rel="tag">random-eff-in-mixed-model</a>$\to$<a href="https://stats.stackexchange.com/questions/tagged/mixed-model" class="post-tag" title="show questions tagged &#39;mixed-model&#39;" rel="tag">mixed-model</a><br>
<a href="https://stats.stackexchange.com/questions/tagged/fixed-eff-in-mixed-model" class="post-tag" title="show questions tagged &#39;fixed-eff-in-mixed-model&#39;" rel="tag">fixed-eff-in-mixed-model</a>$\to$<a href="https://stats.stackexchange.com/questions/tagged/mixed-model" class="post-tag" title="show questions tagged &#39;mixed-model&#39;" rel="tag">mixed-model</a><br>For questions about random effects and fixed effects in mixed models. We don't need separate tags for that, so these should be synonyms of the existing <code>[mixed-model]</code> tag.</p></li>
</ol>

<p>With this arrangement, anybody typing "random-e..." in the tag field will get two suggestions and will be able to choose an appropriate one. The current tags <a href="https://stats.stackexchange.com/questions/tagged/random-effects-model" class="post-tag" title="show questions tagged &#39;random-effects-model&#39;" rel="tag">random-effects-model</a> and <a href="https://stats.stackexchange.com/questions/tagged/fixed-effects-model" class="post-tag" title="show questions tagged &#39;fixed-effects-model&#39;" rel="tag">fixed-effects-model</a> should be sorted out and eliminated. I don't see any disadvantage of my suggested arrangement, but I see multiple advantages (e.g. all questions about mixed models will be under [mixed-model] instead of being divided between [mixed-model] and [random-effects-model]).</p>

<p>@StasK <a href="https://stats.meta.stackexchange.com/a/1371/28666">wrote back in 2012</a> that </p>

<blockquote>
  <p>May be there should be <code>random-effects-model-econometrics</code> and <code>fixed-effects-model-econometrics</code> subtags</p>
</blockquote>

<p>which is in line with what what I am suggesting here. The tag names have to be shorter though, due to the 25 chars limit.</p>

<hr>

<p><strong>This would require a substantial retagging effort but I would volunteer to do it.</strong> I looked the last 50 questions in both tags, and here is how they are split between topics:</p>

<pre><code>                             econ      MM      both     neither      sum
 fixed-effects-model:         37       8       -        5            50
 random-effects-model:        15       35      -        -            50
</code></pre>

<p>Based on that, I would take the mixed-model Qs out of fixed-effects-model, and the econometrics Qs out of random-effects model, and then we could do tag renames for the rest.</p>

<p>There are 1001 threads tagged with either of these tags. The fraction to be manually retagged is ~15/50. So it's 1000*15/50 = 300 threads. With 10/day it will take 1 month.</p>
