https://ec.europa.eu/commission/presscorner/api/files/document/print/en/ip_23_4348/IP_23_4348_EN.pdf
https://www.bruegel.org/wp-content/uploads/2021/05/PC-2021-11-ecofin-210521.pdf
https://www.eurofound.europa.eu/sites/default/files/ef_publication/field_ef_document/ef1710en.pdf
https://www.elibrary.imf.org/downloadpdf/book/9798400224119/CH004.xml