https://www.nuffieldtrust.org.uk/news-item/what-can-the-new-government-learn-from-other-countries-attempts-to-reform-pay-in-social-care-0
http://www.imf.org/external/np/seminars/eng/2015/secularstag/pdf/Venkateswaran.pdf
https://documents1.worldbank.org/curated/en/099152301082423951/pdf/IDU10e3b5c3c1eb9214f981ad6116416052537cd.pdf