Some Companies Fight Pay Gap By Eliminating Salary Negotiations

When it comes to negotiating salaries, the research is pretty clear: women are less assertive than men. It's one reason women who start their careers with a narrower pay gap see it widen over time.

Carnegie Mellon economics professor Linda Babcock, who studies the gender pay gap, says men are four times more likely to negotiate their pay. That keeps women at a disadvantage, though they're not always aware of it.

"The standard now is that people don't really know what each other earns, that some people negotiate and some...