https://www.brookings.edu/wp-content/uploads/2016/07/Full-Report.pdf
http://library.fes.de/pdf-files/dialog/13464.pdf
https://www.etui.org/sites/default/files/2024-04/Benchmarking%20Working%20Europe%202024%20The%20ongoing%20quest%20for%20Social%20Europe_2024.pdf
https://www.boeckler.de/pdf/p_imk_report_125e_2017.pdf