http://economics.mit.edu/files/12979
https://www.imk-boeckler.de/fpdf/HBS-008792/p_imk_study_91_2024.pdf
https://www.wsi.de/fpdf/HBS-008657/p_wsi_report_86e_2023.pdf
https://www.socialeurope.eu/marrying-labour-flexibility-protection