<p>The <a href="https://stats.stackexchange.com/questions/tagged/sem" class="post-tag" title="show questions tagged &#39;sem&#39;" rel="tag">sem</a> tag is described as being for structural equation modeling, but a proportion (my hunch: 25%) of its use is for (econometric) simultaneous equation models.</p>

<p>Is it worth clarifying, or splitting the tag? </p>
