
https://www.brookings.edu/wp-content/uploads/2020/03/Del-Negro-et-al-Conference-Draft.pdf

https://wiiw.ac.at/migration-or-automation-recommendations-for-how-to-better-navigate-labour-shortages-in-the-eu-dlp-7283.pdf

https://www.strategie.gouv.fr/sites/strategie.gouv.fr/files/atoms/files/2020-05-13_etat_des_lieux_du_financement_de_la_protection_sociale.pdf