<div dir="ltr"><b><font color="#ff0000">What accounts for the continued dominance of the JCR in the citation metrics market, especially when faced with excellent free alternatives?</font></b> In addition to data quality, historical persistence may play a role.<div class="gmail_default" style="font-family:arial,helvetica,sans-serif;display:inline">​ ​</div>Established indicators (and the companies that produce them) persist, in part, because they provide longitudinal context.<div><br><a href="http://scholarlykitchen.sspnet.org/2015/06/09/data-curation-the-new-killer-app/">http://scholarlykitchen.sspnet.org/2015/06/09/data-curation-the-new-killer-app/</a></div></div>