http://cdn.budgetresponsibility.org.uk/July_2017_Fiscal_risks.pdf
https://www.ifs.org.uk/publications/10302
https://ec.europa.eu/commission/sites/beta-political/files/seminar-20200114-lpf_en.pdf
http://blogs.sussex.ac.uk/uktpo/files/2017/11/Briefing-Paper-11.pdf