Then again, I wouldn't want to work for someone who doesn't understand basic negotiations.
And once we've expanded our model to include base human instincts over rational economic behavior, sexism isn't an implausible explanation at all.
Personally I hate negotiation, that is one the worst things about Human society IMO, offer me a fair wage, offer me a fair price, I do not understand people that want to haggle and negotiate over everything
The more I advance into higher and higher roles, and the more salary negotiation becomes a thing more I long for the days where it was just a job, the company was Paying $xx/hr and has 100 openings, if you wanted to work for XX/hr great if not there are 300 other people waiting to do the job.