http://www.niesr.ac.uk/sites/default/files/publications/NIESR%20EU2%20MIGRATION%20REPORT.pdf
https://www.migrationpolicy.org/news/eu-pact-migration-asylum-bold-move-avoid-abyss
https://www.socialeurope.eu/2017/06/answer-wages-not-capital/
https://www.gainesvilletimes.com/opinion/letter-why-mexico-border-wall-probably-waste-time-money/