https://www.ecb.europa.eu/pub/pdf/ecbu/eb201703.en.pdf?ea7747ab0ef3b038300a8d51a3a95313
https://www.economiesuisse.ch/de/artikel/gut-so-trotz-zinspause-wird-die-geldpolitik-straffer
https://www.socialeurope.eu/2017/07/european-welfare-states-perform/
https://www.ft.com/content/bcebd77c-057b-4fd0-bd99-b97e0e559455