https://cepr.org/sites/default/files/policy_insights/PolicyInsight91.pdf
https://blogs.imf.org/2019/04/10/weak-spots-in-global-financial-system-could-amplify-shocks/?utm_medium=email&utm_source=govdelivery
https://www.piie.com/blogs/realtime-economics/if-markets-are-right-about-long-real-rates-public-debt-ratios-will
https://pubs.aeaweb.org/doi/pdfplus/10.1257/jep.38.3.89