https://www.socialeurope.eu/trump-and-brexit
https://cer.org.uk/sites/default/files/bulletin_114_js_st_article1.pdf
http://www.rug.nl/research/portal/files/41711829/cesifo1_wp6448.pdf
http://www.coggs.polis.cam.ac.uk/news/forum-on-geopolitics-triple-bill-on-brexit