https://gabriel-zucman.eu/files/TWZ2020b.pdf
https://www.eca.europa.eu/Lists/News/NEWS1801_16/INSR_SSM2_EN.pdf
https://www.finance-watch.org/press-release/reaction-european-commission-proposes-approach-to-fiscal-rules-review/
https://pubs.aeaweb.org/doi/pdfplus/10.1257/jep.38.3.89