https://www.eurofound.europa.eu/eqls-flagship/
https://www.nuffieldtrust.org.uk/news-item/privatisation-by-the-front-door-what-does-a-new-public-private-gp-model-mean
https://www.socialeurope.eu/wp-content/uploads/2017/08/Occ-Pap-13-PDF.pdf
http://www.progressives-zentrum.org/wp-content/uploads/2018/10/Les-Oubliés-Entretiens-sur-les-terres-où-prospère-le-vote-extrême_Das-Progressive-Zentrum_Johannes-Hillje.pdf