[swampangel]

There is a recent study where they saw the opposite, that quotas caused less-capable in-group members to be pushed out:

http://blogs.lse.ac.uk/europpblog/2017/04/05/gender-quotas-a...

I haven't seen a lot of discussion around this - it may be bunk. But there are a lot of intuitive ideas about hiring that don't hold up.