https://www.cidrap.umn.edu/sites/default/files/public/downloads/cidrap-covid19-viewpoint-part1.pdf
http://www.ips-journal.eu/regions/global/article/show/why-pollsters-normally-get-it-right-more-or-less-2299/
http://go.carnegieendowment.org/iHTP0VPKETn00o001NP0V0F
https://www.mckinsey.com/featured-insights/diversity-and-inclusion/five-fifty-the-color-of-wealth?cid=fivefifty-eml-alt-mkq-mck&hlkid=22632777838146f4a236ee00fa3ab2f1&hctky=2073353&hdpid=d18bd6c1-419e-4ecf-9f54-0bed589bb064#