[imaginenore]

It's your job to prove that there's a gap attributed to gender, specifically. Good luck showing us even one such study.

When PayScale did their study, they controlled for some of the obvious factors, and the gap pretty much disappeared. They obviously didn't control for everything.

http://www.payscale.com/gender-lifetime-earnings-gap

You can also find a niche in which men or women make more, that's inevitable, just due to the randomness of the salaries. I'm yet to see any evidence for the systemic discrimination.