Huh, the other thread [1] with a similar title was flag-killed.

The study is here: http://journals.plos.org/plosone/article?id=10.1371/journal....

If this one sticks around I hope for better non-inflammatory discussion.

[1] https://news.ycombinator.com/item?id=9924789

EDIT: Note while this is a much better article about the study it's still a bit click-baity and includes some interesting word choice that could be considered sexist (e.g. insinuating men are Neanderthalish, that sex-imbalance isn't a problem when a community is primarily women like Pinterest, etc.)