Haidt's claim seems to be the effect is strongest during gestation/early childbirth. Possibly there weren't as many cars around before the mid 1960s, so Boomers didn't suffer the same effect? Just a guess.
Only about 60% of Americans lived in cities in 1950. By 1980, it was about 75%.
Thanks. Did not consider population distribution.
My limited research confirmed when the lead effect is strongest. Most Boomers were 14 or under by 1960, so fewer cars makes some sense.
Haidt's claim seems to be the effect is strongest during gestation/early childbirth. Possibly there weren't as many cars around before the mid 1960s, so Boomers didn't suffer the same effect? Just a guess.
Only about 60% of Americans lived in cities in 1950. By 1980, it was about 75%.
Thanks. Did not consider population distribution.
My limited research confirmed when the lead effect is strongest. Most Boomers were 14 or under by 1960, so fewer cars makes some sense.