They found this by looking at Dutch civil servants who qualified for early retirement in 2005.“This paper estimates the impact of early retirement on mortality using Dutch administrative micro panel data. An unexpected temporary decrease in the eligibility age for retirement benefits for civil servants is used to instrument the retirement choice. We find that induced early retirement decreased the probability that a man dies within 5 years by 2.6 percentage points. Positive health effects of retirement have also been found by studies using data from Israel, England, Germany and other European countries. The scientist practiced what he preached - up until a few months before his death he worked up to 18 hours a day.”According to the article, another 2016 study also found this conclusion to be true.

Source: Egypt Today March 01, 2019 11:15 UTC