https://www.boeckler.de/pdf/p_imk_report_141e_2018.pdf
https://www.nuffieldtrust.org.uk/files/2017-07/learning-from-scotland-s-nhs-final.pdf
https://theconversation.com/fact-check-does-immigration-have-an-impact-on-wages-or-employment-83666
https://www.socialeurope.eu/2017/07/real-measure-inequality/