Is retirement good for the brain? — Keio University and others analyze with AI how retirement affects cognitive function in a survey of more than 7,000 people: Innovative Tech from a while ago

A Keio University-led international study analyzed 7,432 adults aged 50–80 across 19 countries.

Using causal inference based on pension eligibility age and causal forests, the team found retirement tends to improve cognitive function on average.

The effect varied widely by individual, suggesting retirement’s cognitive impact is not uniform.

The findings offer new evidence for designing post-retirement health and work policies for older adults.