https://reformscotland.com/wp-content/uploads/2018/04/The-VAT-opportunity.pdf
https://www.brookings.edu/articles/the-hutchins-center-explains-the-neutral-rate-of-interest/
https://www.ecb.europa.eu/press/key/date/2012/html/sp120726.en.html
http://cep.lse.ac.uk/pubs/download/brexit11.pdf