<p>There are now two tags, <a href="https://stats.stackexchange.com/questions/tagged/pre-post-comparison" class="post-tag" title="show questions tagged &#39;pre-post-comparison&#39;" rel="tag">pre-post-comparison</a> and <a href="https://stats.stackexchange.com/questions/tagged/change-scores" class="post-tag" title="show questions tagged &#39;change-scores&#39;" rel="tag">change-scores</a> essentially covering the same topic. I propose we let <a href="https://stats.stackexchange.com/questions/tagged/pre-post-comparison" class="post-tag" title="show questions tagged &#39;pre-post-comparison&#39;" rel="tag">pre-post-comparison</a>  be the main one (even if is is newer and less used), as it is the most general one.</p>
