https://cepr.org/sites/default/files/policy_insights/PolicyInsight92.pdf
https://knowledge.wharton.upenn.edu/article/pandemic-turbo-charging-government-innovation-will-stick/?utm_source=kw_newsletter&utm_medium=email&utm_campaign=2020-05-19
https://www.diw.de/documents/publikationen/73/diw_01.c.578096.de/18-7-3.pdf
https://www.dsgv.de/newsroom/presse/190912_PM_EZB_30.html