https://www.socialeurope.eu/2017/07/real-measure-inequality/
http://www.britishchambers.org.uk/press-office/press-releases/bcc-firms-invest-in-local-labour-but-still-need-foreign-skills-to-plug-shortages.html
http://www.russellgroup.ac.uk/media/5521/rg-international-students-june-2017.pdf
http://www.ilo.org/wcmsp5/groups/public/—dgreports/—dcomm/—publ/documents/publication/wcms_537982.pdf