I have to read that book to understand why it seems to be so different in USA (I presume).
Some links about the topic in norwegian: https://www.nrk.no/norge/jentene-tar-over-prestisjestudiene-... https://www.nrk.no/norge/_-guttene-ligger-langt-bak-jentene-... https://www.vg.no/nyheter/meninger/i/B7XG7/hvorfor-blir-gutt... https://www.regjeringen.no/no/aktuelt/Jenter-flinkere-pa-sko...