1 - more roleplay
2 - perceptions of women in management, says nothing about earnings, concludes people may actually prefer female managers.
3 - Says women who alter their behaviour in certain ways actually do better than men.
I'm not sure of the point you were trying to make, but they don't seem to support the idea that women are actively penalised for negotiating out in the real world.
http://www.upi.com/Health_News/2008/08/11/More-assertive-wom...
or this?
http://vault.hanover.edu/~altermattw/social/assets/w12papers...
or maybe this?
http://www.gsb.stanford.edu/news/research/womencareerresearc...