<p>I usually agree with @gung on tag issues, but this time I am not convinced by his answer. I want to make two points.</p>

<p>I don't see how we can meaningfully separate tags for zero-inflated count models, hurdle count models, and zero-inflated-aka-hurdle continuous models. Because: (A) Zero-inflated and hurdle count models are clearly distinct but <em>very</em> similar and <em>very</em> related. I think they should be grouped together in one tag. (B) For continuous models, there is no difference between zero-inflated and hurdle. I googled a bit, and I see that people talk about "zero-inflated gamma" and "hurdle gamma" models (and the same for lognormal). That's the same thing.</p>

<p>Hence, my point #1: we need one tag for <code>[zero-inflated-and-hurdle-count-and-continous-models]</code>. Let's say we call it <a href="https://stats.stackexchange.com/questions/tagged/zero-inflated-and-hurdle-models" class="post-tag" title="show questions tagged &#39;zero-inflated-and-hurdle-models&#39;" rel="tag">zero-inflated-and-hurdle-models</a>.</p>

<p>@Gung suggests to have <a href="https://stats.stackexchange.com/questions/tagged/zero-inflated-data" class="post-tag" title="show questions tagged &#39;zero-inflated-data&#39;" rel="tag">zero-inflated-data</a> separately from the model tag(s). I am not sure I see the benefit. 100% of questions in the former tag would fit to the latter tag, and I think that most (90%?) of the questions in the latter would fit to the former.</p>

<p>Hence my point #2: let's just use <a href="https://stats.stackexchange.com/questions/tagged/zero-inflation" class="post-tag" title="show questions tagged &#39;zero-inflation&#39;" rel="tag">zero-inflation</a> for all of that.</p>

<p>Yes, there are other models to deal with zero-inflated data. E.g. <a href="https://stats.stackexchange.com/questions/tagged/tobit-regression" class="post-tag" title="show questions tagged &#39;tobit-regression&#39;" rel="tag">tobit-regression</a> or <a href="https://stats.stackexchange.com/questions/tagged/tweedie-distribution" class="post-tag" title="show questions tagged &#39;tweedie-distribution&#39;" rel="tag">tweedie-distribution</a>. These tags should clearly stay separate. I admit that there is some conceptual blurriness here, but this currently seems to me to be the most reasonable approach.</p>

<p>(On reflection, I would get rid of <a href="https://stats.stackexchange.com/questions/tagged/point-mass-at-zero" class="post-tag" title="show questions tagged &#39;point-mass-at-zero&#39;" rel="tag">point-mass-at-zero</a> altogether because it seems to be used for other things as well, such as priors with point mass at zero.)</p>
