https://docs.house.gov/meetings/JU/JU05/20220517/114776/HHRG-117-JU05-Wstate-LynnB-20220517.pdf
https://www.bankofengland.co.uk/-/media/boe/files/financial-stability-paper/2018/mind-the-current-account-gap.pdf?la=en&hash=E4599C6878FBDC6480EABCC51A6A4419C963AD9F
https://taxfoundation.org/flat-tax-state-income-tax-reform/
https://open.overheid.nl/documenten/ronl-48b77cf7bdf0f91d4ed394ca2a37d2041bc50647/pdf