[anonemouse145]

Disregard down votes, this is 100% correct. I only add:

Read up on the Dunning-Kruger effect. Realize smart people undervalue themselves, and dumb people overvalue themselves. Remember that if only dumb people ask for a promotion, one of them gets it. If you're a good employee, always shoot a little above your worth to compensate.

People are whining that it's hard to know your value, that people are timid, and many people can't walk.

I agree, and that's why they're underpaid. It's not your boss's fault if you're uninformed, timid, or scared to ask for a raise. Do what you need to do to improve your bargaining position. Then leverage it.

Thr vast majority of the supposed "wage gap" is that men feel compelled to climb the hierarchy. They take more risks asking for raises and positions- even if they aren't qualified, and even at the expense of work life balance. You can do that too, if you want the money.

Emphasis on if.