https://www.boeckler.de/pdf/p_imk_study_58_2018.pdf
https://files.taxfoundation.org/20211014170634/International-Tax-Competitiveness-Index-2021.pdf
https://www.niesr.ac.uk/sites/default/files/UK%20Economy%20Press%20Release%20-NIER%20No245%20%20August%202018%20-%20EMBARGOED%20until%2000.01%20Wednesday%201st%20August.pdf
https://www.strategie.gouv.fr/sites/strategie.gouv.fr/files/atoms/files/premier-rapport-cnp-avril-2019_0.pdf