It's also possible that there's a co-factor: TV appeared about the same time as ... | Hacker News

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dripton on Feb 29, 2012 | parent | context | favorite | on: How To Be Happy Anywhere

It's also possible that there's a co-factor: TV appeared about the same time as reliable birth control.

gwern on Feb 29, 2012 [–]

Reliable birth control penetrated each district or governmental sub-unit at the same time as the TV stations?

dripton on March 1, 2012 | [–]

Possibly. (Not necessarily at exactly the same time.)

I read the study, and they did attempt to isolate this effect from others, but correlation is still not proof of causality.

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