https://www.imf.org/-/media/Files/Publications/PP/2023/English/PPEA2023001.ashx
https://www.hesa.ac.uk/data-and-analysis/publications/finances-2015-16/introduction
https://www.brookings.edu/blog/techtank/2021/07/10/the-biden-administration-takes-an-overdue-first-step-to-foster-competition/?utm_campaign=Brookings%20Brief&utm_medium=email&utm_content=140224222&utm_source=hs_email
https://www.project-syndicate.org/commentary/eurozone-sustainable-economic-recovery-by-simon-johnson-2017-06