https://www.washingtonpost.com/national/health-science/a-group-of-middle-aged-american-whites-is-dying-at-a-startling-rate/2015/11/02/47a63098-8172-11e5-8ba6-cec48b74b2a7_story.html
Case and Deaton were examining government statistics on death rates and illness when they discovered the spike in mortality for people ages 45 to 54 in the period between 1999 and 2013.