https://scholar.harvard.edu/files/rogoff/files/ilzetki_reinhart_rogoff_qje_2019_2.pdf
https://www.dbresearch.de/PROD/RPS_DE-PROD/PROD0000000000523908/Deutschland%3A_Konjunktur_kurzgefasst.PDF
https://www.ipp.eu/wp-content/uploads/2018/10/cepremap-macro-budget2019.pdf
http://www.levyinstitute.org/pubs/wp_886.pdf