https://www.socialeurope.eu/the-ecb-and-inflation-a-general-fighting-the-last-war
https://www.socialeurope.eu/2017/06/understanding-productivity-puzzle/
https://www.socialeurope.eu/austerity-a-cyclical-tale
https://www.taxpolicycenter.org/sites/default/files/publication/163549/report-taxing-business-incomes-evidence-from-the-survey-of-consumer-finances.pdf