https://rusi.org/commentary/data-driven-responses-coronavirus-pandemic-and-privacy-implications
http://www.ips-journal.eu/regions/europe/article/show/the-topsy-turvy-election-pollsters-failed-to-predict-2096/
http://wir2018.wid.world/files/download/wir2018-summary-french.pdf
https://www.inequalityindex.com/