I'm disappointed that people are getting their "agenda" retaliation in early, disregarding most of the content of the paper.
Rather surprisingly this is limited to male (!) inventors in Finland (!), seemingly because that was the easiest place to get a whole-population IQ dataset in an otherwise fairly equal country. One of their conclusions is that involvement of the father is a positive and that divorce is a negative. If you're going to dismiss this as lefty nonsense then that is not the kind of conclusion to expect from it.
Rather surprisingly this is limited to male (!) inventors in Finland (!), seemingly because that was the easiest place to get a whole-population IQ dataset in an otherwise fairly equal country. One of their conclusions is that involvement of the father is a positive and that divorce is a negative. If you're going to dismiss this as lefty nonsense then that is not the kind of conclusion to expect from it.