https://www.brookings.edu/articles/house-republicans-want-to-cut-the-irs-budget-again/
https://www.niesr.ac.uk/sites/default/files/UK%20Economy%20Press%20Release%20-NIER%20No245%20%20August%202018%20-%20EMBARGOED%20until%2000.01%20Wednesday%201st%20August.pdf
https://reformscotland.com/wp-content/uploads/2018/04/The-VAT-opportunity.pdf
http://www.transparency.org/news/feature/europe_and_central_asia_an_overall_stagnation