This is is a perfect paper to get ripped apart/defend by everyone. Too many variables and too easy to defend or pull apart. It will line up with your prior beliefs and change nothing.
Well, it's not easy to investigate how poverty affects your whole life history xD
It would take an investigator their entire life as well, assuming they started super young. And who wants to pay for such investigation?
I don't disagree with you. I don't have a solution either. I also know that the paper linked above put on HN will not make much of a difference to peoples perspectives on the matter since it doesn't have a ton of merit to it.
So the question becomes -- whats the point of posting it here other than to inflame commentary?
I can agree that it's really hard to build good science here.
But at the same time, a huge number of the variables seem like they would be directly downstream of socioeconomic status. It affects so much of our lives.
