I have mixed feelings on this article. It is interesting, with a big data set (>20,000 from U of M study) but the major findings seems to be that:
https://obliviousinvestor.com/61-the-magic-retirement-age/
- Retirement age is subject to "Regression to the Mean" (thank you Francis Galton) with a 61 years old mean
- There are no good predictors to identify early retirees
- But be prepared because you likely won't retire on your initial schedule.
https://obliviousinvestor.com/61-the-magic-retirement-age/