http://www.globalbusinessoutlook.com/germanys-government-still-has-an-allergy-to-investing/
http://www.cesifo-group.de/portal/page/portal/DocBase_Service/studien/Studie-2017-Felbermayr-etal-Brexit-79843.pdf
https://www.socialeurope.eu/the-discreet-but-dubious-charm-of-tax-treaties