<p>Initially I had thought that maintaining a separate tag for regression distinct from the other tags (e.g. multiple-regression, linear-regression, etc.) would be worthwhile. Mainly because I feel there are questions that are related to regression, but aren't intrinsically related to the more specific tags. For instance <a href="https://stats.stackexchange.com/questions/9871/is-a-predictor-with-greater-variance-better">this question</a> (whether a predictor with greater variance is better) is not inherently related to linear-regression, while <a href="https://stats.stackexchange.com/questions/9825/changing-null-hypothesis-in-linear-regression">this question</a> (Changing null hypothesis) is. But that being said, I suspect to maintain any type of fidelity between the regression and the linear-regression tags it would take heavy moderator involvement <em>forever</em>.</p>

<p>I would like to see as much discrimination between the tags as possible though. I see 10 questions have both the <a href="https://stats.stackexchange.com/questions/tagged/regression+logistic-regression">regression and the logistic-regression tag</a>, and I think all of them could effectively drop one of the tags. None of the other regression tags are used frequently enough to be concerned, but should we attempt to only tag questions with one of the regression tags in most situations?</p>
