https://www.eurofound.europa.eu/sites/default/files/ef_publication/field_ef_document/ef1711en.pdf
https://www.brookings.edu/wp-content/uploads/2016/07/Full-Report.pdf
http://ec.europa.eu/social/main.jsp?catId=1143&intPageId=3193&langId=en/
https://www.socialeurope.eu/2017/06/strange-non-death-almps/