Would be interesting to explore the effects of larger families with educated parents. Poor families do tend to have more children, but it's a boring statistic

Would be interesting to explore the effects of larger families with educated parents. Poor families do tend to have more children, but it's a boring statistic in my mind. There are many variables that accompany poverty that could easily hold more sway in the child's success. It seems like the coupling of more children means a child is less mentally stimulated being a red herring. Lonely children would seem to be stimulated less than those who can daily interact with their siblings. Also there has to be some value in the child's upbringing with parents who improve their parenting styles over time. It's a bit obvious for anyone that has had a larger family that one makes more parenting mistakes with the first children. Parenting is a learning process after all. Anyways, I think this study is a boring example of bias confirmation by a few P-values without much new information. And like everyone has also some how thought of (why wasn't this mentioned in the study) - inheritance (whether bequeathed or retained) is the elephant in the room.