http://www.resolutionfoundation.org/app/uploads/2017/01/Audit-2017.pdf
http://www.japantimes.co.jp/opinion/2017/05/15/commentary/world-commentary/france-great-britain-unbeatable-combination/#.WTqNinm1s2x
https://www.nao.org.uk/wp-content/uploads/2018/01/PFI-and-PF2.pdf
https://lawliberty.org/grievance-based-policy-analysis/