[jorgemf]

I think there are studies that probe that claim. In my experience when I told some female friends to ask for a raise because they deserved it, some of them decided not to do it because a list of non-sense excuses (afraid to talk with their supervisors, that they will look for another job in the future, that their bosses don't like them, etc)

Bear in mind the published doc don't have the references the original work had. They removed them when they made it public (not the author)