https://wiiw.ac.at/rrf-2-0-ein-permanenter-eu-investitionsfonds-im-kontext-von-energiekrise-klimawandel-und-eu-fiskalregeln-dlp-6413.pdf
https://www.brookings.edu/wp-content/uploads/2023/03/20230504_TPC_Gale_FiscalOutlookUPDATE.pdf
https://data.oecd.org/natincome/net-lending-borrowing-by-sector.htm