Because it doesn't say it's due to deliberate discrimination, libs will be upset, but it also doesn't figure in women chosing lower paying fields and quitting and working part time as an impact on how much they get paid. So naturally the liberal conclusion from this is to further feminize boys to achieve "equality".. They currently aren't pussified enough, but eventually in the future if boys are pussified enough they might to strive so hard and work and may be too chicken to ask for a raise.
EQUALITY!
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Gender wage gap: Overconfidence benefits men.
EQUALITY!
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Gender wage gap: Overconfidence benefits men.