http://economics.mit.edu/files/12979
https://www.bloomberg.com/news/articles/2018-04-04/europe-s-growth-engine-is-running-out-of-steam-chart
http://ec.europa.eu/social/main.jsp?catId=1143&intPageId=3193&langId=en/
https://www.ons.gov.uk/employmentandlabourmarket/peopleinwork/earningsandworkinghours/articles/contractsthatdonotguaranteeaminimumnumberofhours/may2017