https://www.socialeurope.eu/2017/06/dispelling-creative-myths-lower-employment-protection/
https://www.socialeurope.eu/2017/07/time-eu-fair-movement-directive/
https://www.instituteforgovernment.org.uk/sites/default/files/publications/coronavirus-unemployment-five-nation-comparison.pdf
http://economics.mit.edu/files/12979