https://committees.parliament.uk/publications/4976/documents/50058/default/
http://www.ibec.ie/IBEC/Press/PressPublicationsdoclib3.nsf/vPages/Newsroom~ibec-forecasts-strong-economic-growth-and-employment-increases-09-08-2017?OpenDocument?OpenDocument
https://home.treasury.gov/system/files/136/Treasury_Study_WoA.pdf
https://www.eurofound.europa.eu/sites/default/files/ef_publication/field_ef_document/ef19045en.pdf