http://www.bankofengland.co.uk/publications/Documents/inflationreport/2017/aug.pdf
http://ec.europa.eu/epsc/sites/epsc/files/epsc_europe_is_back_trends_jan.pdf
https://taxfoundation.org/flat-tax-state-income-tax-reform/
https://www.socialeurope.eu/sweden-achievements-uncertainty