https://www.eca.europa.eu/Lists/ECADocuments/Briefing_paper_MFF/Briefing_paper_MFF_EN.pdf
http://www.cesifo-group.de/portal/page/portal/DocBase_Service/studien/Studie-2017-Felbermayr-etal-Brexit-79843.pdf
https://www.socialeurope.eu/taking-aim-at-sellers-inflation