It’s surprising anyone would publish or conduct this research, as it presents a problem for “blank slate theory”. If human mating is assortive, then corellations between parent and child socioeconomic status are likely to be substantively due to genetic factors rather than solely oppression. The alternative would be a theory of “genetic oppression” requiring some sort of genetic equity, but that route is a trap for progressive thought due to that movement’s historical love of eugenics.