
https://www.econstor.eu/bitstream/10419/283282/1/1877510009.pdf

https://www.brookings.edu/articles/house-republicans-want-to-cut-the-irs-budget-again/

http://www.cesifo-group.de/portal/page/portal/DocBase_Service/studien/Studie-2017-Felbermayr-etal-Brexit-79843.pdf