If You’re Over 50, Chances Are the Decision to Leave a Job Won’t be Yours — ProPublica
https://www.propublica.org/article/older-workers-united-states-pushed-out-of-work-forced-retirement
New Evidence of Age Bias in Hiring, and a Push to Fight It - The New York Times
https://www.nytimes.com/2019/06/07/business/economy/age-discrimination-jobs-hiring.html
Programmers: Before you turn 40, get a plan B (2009) | Hacker News
https://news.ycombinator.com/item?id=20592384
Programmers: Before you turn 40, get a plan B | Improving Software
https://improvingsoftware.com/2009/05/19/programmers-before-you-turn-40-get-a-plan-b/