https://lawliberty.org/book-review/the-canary-in-the-feds-coal-mine/
https://wiiw.ac.at/do-interest-growth-differentials-affect-fiscal-policy-evidence-for-advanced-economies-dlp-6694.pdf
https://www.ecb.europa.eu/press/key/date/2012/html/sp120726.en.html
https://www.socialeurope.eu/euro-enlargement-convergence-definancialization