Now I have to look this up...
I mean the studies I found were pretty much outdated(way before I was born), but they pretty much relegated black women in managerial roles to the modern day mammies. They're overall seen as inferior(less threatening), paid considerably less than white males, seen as less of a sexual threat(unattractive)...
http://deepblue.lib.umich.edu/bitstream/handle/2027.42/45590/?sequence=1
All that other stuff is still true- they are still paid much less than white males, they are still seen as unattractive, etc. They are def. seen as more threatening than white women, just less than Black men.