https://files.taxfoundation.org/20211014170634/International-Tax-Competitiveness-Index-2021.pdf
https://ecipe.org/wp-content/uploads/2024/02/ECI_OccasionalPaper_02-2024_LY02.pdf
https://pubs.aeaweb.org/doi/pdfplus/10.1257/jep.36.4.103
https://www.economiesuisse.ch/sites/default/files/publications/swisscode_e_web.pdf