Re: Dunno about hacking
VRH -- perhaps the ref is from PLOS "Countries with Higher Levels of Gender Equality Show Larger National Sex Differences in Mathematics Anxiety and Relatively Lower Parental Mathematics Valuation for Girls
Gijsbert Stoet , Drew H. Bailey , Alex M. Moore , David C. Geary
Published: April 21, 2016https://doi.org/10.1371/journal.pone.0153857" or the article in the Atlantic
https://www.theatlantic.com/science/archive/2018/02/the-more-gender-equality-the-fewer-women-in-stem/553592/
There is an interesting graph which shows Algeria and Turkey with double the female STEM grads of Scandinavia