https://blogs.imf.org/2017/12/07/chart-of-the-week-sharing-the-wealth-inequality-and-who-owns-what/
https://papers.ssrn.com/sol3/Delivery.cfm/SSRN_ID3950757_code410506.pdf?abstractid=3909166&mirid=1
https://www.healthaffairs.org/content/forefront/outlook-us-health-spending-growth-blast-past
http://www.margaretthatcher.org/document/107332