https://www.eurofound.europa.eu/sites/default/files/wpef17037.pdf
https://www.etui.org/sites/default/files/2020-12/Social%20policy%20in%20the%20European%20Union%20state%20of%20play%202020-web.pdf
https://www.brookings.edu/research/is-long-covid-worsening-the-labor-shortage/?utm_campaign=Brookings%20Brief&utm_medium=email&utm_content=200588850&utm_source=hs_email
https://docs.iza.org/dp16728.pdf