<p>Well, it took a while, but I'm finally done with <a href="https://stats.meta.stackexchange.com/questions/2510/the-kernel-tag-is-a-mess-should-it-be-changed">this effort</a>: every question in <a href="https://stats.stackexchange.com/questions/tagged/kernel" class="post-tag" title="show questions tagged &#39;kernel&#39;" rel="tag">kernel</a> has been sorted into <a href="https://stats.stackexchange.com/questions/tagged/kernel-trick" class="post-tag" title="show questions tagged &#39;kernel-trick&#39;" rel="tag">kernel-trick</a> and/or <a href="https://stats.stackexchange.com/questions/tagged/kernel-density-estimate" class="post-tag" title="show questions tagged &#39;kernel-density-estimate&#39;" rel="tag">kernel-density-estimate</a>.</p>

<ul>
<li><p><a href="https://stats.stackexchange.com/questions/tagged/kernel" class="post-tag" title="show questions tagged &#39;kernel&#39;" rel="tag">kernel</a> is now empty; a moderator should destroy it.</p></li>
<li><p>Synonymizing <a href="https://stats.stackexchange.com/questions/tagged/kernel-density-estimate" class="post-tag" title="show questions tagged &#39;kernel-density-estimate&#39;" rel="tag">kernel-density-estimate</a> to <a href="https://stats.stackexchange.com/questions/tagged/kernel-smoothing" class="post-tag" title="show questions tagged &#39;kernel-smoothing&#39;" rel="tag">kernel-smoothing</a> would remove the slight misclassification of lumping kernel regression in the KDE tag. I didn't count as I read them, but I would very roughly estimate that maybe 15% of questions currently in <a href="https://stats.stackexchange.com/questions/tagged/kernel-density-estimate" class="post-tag" title="show questions tagged &#39;kernel-density-estimate&#39;" rel="tag">kernel-density-estimate</a> are actually about kernel regression, and another reasonable portion are about kernel functions in general (not specific to KDE or regression). There are also a handful of questions in <a href="https://stats.stackexchange.com/questions/tagged/kernel-regression" class="post-tag" title="show questions tagged &#39;kernel-regression&#39;" rel="tag">kernel-regression</a>, which should also be synonymized to <a href="https://stats.stackexchange.com/questions/tagged/kernel-smoothing" class="post-tag" title="show questions tagged &#39;kernel-smoothing&#39;" rel="tag">kernel-smoothing</a> if that's what's happening.</p></li>
<li><p>The relevant tag wikis need to be updated. Since I don't have direct editing privileges on them, I figured I should wait to propose anything until exactly what's happening with the various kernel smoothing tags is finalized.</p></li>
</ul>

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<p>Edited to bump. It seems like no one now disagrees with the proposal of making both <a href="https://stats.stackexchange.com/questions/tagged/kernel-density-estimate" class="post-tag" title="show questions tagged &#39;kernel-density-estimate&#39;" rel="tag">kernel-density-estimate</a> and <a href="https://stats.stackexchange.com/questions/tagged/kernel-regression" class="post-tag" title="show questions tagged &#39;kernel-regression&#39;" rel="tag">kernel-regression</a> into synonyms of <a href="https://stats.stackexchange.com/questions/tagged/kernel-smoothing" class="post-tag" title="show questions tagged &#39;kernel-smoothing&#39;" rel="tag">kernel-smoothing</a>, and leaving <a href="https://stats.stackexchange.com/questions/tagged/kernel-trick" class="post-tag" title="show questions tagged &#39;kernel-trick&#39;" rel="tag">kernel-trick</a> as is. If anyone does have comments about that, please say so.</p>
