http://www.bankofengland.co.uk/publications/Documents/speeches/2017/speech1001.pdf
https://www.brookings.edu/wp-content/uploads/2022/09/Obstfeld-Zhou-Conference-Draft-BPEA-FA22.pdf
https://www.nao.org.uk/wp-content/uploads/2018/01/PFI-and-PF2.pdf
https://www.fraserinstitute.org/sites/default/files/economic-freedom-of-the-world-2021.pdf