https://files.taxfoundation.org/20211014170634/International-Tax-Competitiveness-Index-2021.pdf
https://www.mckinsey.com/~/media/mckinsey/industries/private%20equity%20and%20principal%20investors/our%20insights/mckinseys%20private%20markets%20annual%20review/mckinsey-global-private-markets-review-2020-vf.ashx
http://www.resolutionfoundation.org/app/uploads/2017/01/Audit-2017.pdf
https://cms.ringiermedienschweiz.ch/sites/default/files/media/document/biianz09_wef_e_1.pdf