https://www.socialeurope.eu/greek-economy-recovering-exiting-crisis
https://gabriel-zucman.eu/files/TWZ2020b.pdf
https://uk.finance.yahoo.com/news/britain-public-finances-worse-gambia-153245680.html
http://norden.diva-portal.org/smash/get/diva2:1095959/FULLTEXT02.pdf