Do you guys in the US and elsewhere know about Bourdieu ?
The concept illustrated here, he named social reproduction : Social reproduction is the sociological phenomenon that leads to the transmission of social positions, ways of acting or thinking, from one generation to another.

The dude came from a really remote department of france, his father a field worker then mailman, his mother a little bit better off, he had humble upbringings.
Studying in the averaged sized city of Pau (75k habs), he managed to make it to the best highschool of france through one of his teacher and then graduated from the best school (ENS). So he's litteraly a model of social climbing, no surprises he dedicated a lot of his work into studying the matter. Funilly enough all of his 3 sons managed to graduate from the ENS, that's social reproduction.

His work is really passionating, when you read it you are always surprised how simple what he says is but yet you never really conceptualized it or put it into words yet you were always aware of it. Some might have their mind blown if you weren't really self aware untill then.

no op made a mistake it is indeed noble not nobel

I'd guess it be probably similar cause a dude who graduates from polytechnique doesn't end up marrying a "commoner", goes the other way around too.

But it was probably easier for them to find a father who went through those scools for the survey than a mother. Very few females in some of those schools as of today : Polythechnique is 15% women in 2022 so imagine in 1990.
Today, Sciences Po would be 60% women (not official stat, but from my experience), and ENA less than 40%. The other schools are roughly like polythehnique cause it's sciences so fair to imagine it doesn't go over 30%.