AUTHOR=Borge-Holthoefer Javier, Moreno Yamir, Yasseri Taha TITLE=Editorial: At the Crossroads: Lessons and Challenges in Computational Social Science JOURNAL=Frontiers in Physics VOLUME=4 YEAR=2016 URL=https://www.frontiersin.org/articles/10.3389/fphy.2016.00037 DOI=10.3389/fphy.2016.00037 ISSN=2296-424X