Moving somewhere when you're old doesn't change your life expectancy.
You're confusing something else, possibly average age, with life expectancy.
If the elderly populations of long-lived Florida counties still largely come from migration, longevity may say much more about living and healthcare conditions elsewhere. As well as wealth effects reflected by the ability to retire to Florida.
> Moving somewhere when you're old doesn't change your life expectancy.
It may increase the average life expectancy of the area you are moving to, though.
In other words, while the people who were born and raised in the area may have a low life expectancy, an influx of wealthy retirees will drag up the average life expectancy. In some cases the people moving to these areas may already be older than the average life expectancy.
Fair point. Though we'd be talking moving from a place with a median age of, well, roughly median age. Greatest mortality is in infancy, again in the teens / early 20s (mostly males from violence/accidents), then gradually increases past 40 due to general mortality (disease, illness, cancer, etc.).
I'm not sure that the delta from, say, 40-ish median to the slightly older skew of a retirement-centric Florida community would be great.
You're confusing something else, possibly average age, with life expectancy.
If the elderly populations of long-lived Florida counties still largely come from migration, longevity may say much more about living and healthcare conditions elsewhere. As well as wealth effects reflected by the ability to retire to Florida.