https://www.esri.ie/system/files/publications/SUSTAT95_0.pdf
https://www.socialeurope.eu/employment-shifts-in-europe-during-the-recovery-three-little-noticed-trends
https://www.socialeurope.eu/2017/06/oecd-joined-campaign-higher-wages/
https://www.tuc.org.uk/sites/default/files/Brexit%20Legal%20Opinion.pdf