https://www.boeckler.de/pdf/p_imk_study_55_2017.pdf
https://www.esri.ie/system/files/publications/WP677_0.pdf
https://www.socialeurope.eu/taking-aim-at-sellers-inflation
https://static1.squarespace.com/static/5ef4d1da53822a571493ebd0/t/5ffcfaea93e2771243fce2ff/1610414842497/A-Wealth-Tax-For-The-UK.pdf