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Thanks. I'm not 100% sure what you mean. Do you mean, maybe someone won't be paid as much if they don't feel they're providing a good service, and paid more if they're confident in the quality of their work? Or something else?

No, their attitude reflects how they view the "negotiation" and the value fluctuates with their awareness that they are even negotiating in the first place.

Ahh I see. That's an interesting point. If you don't see your work as valuable, other people will pay you less for it.

People talk a lot about the gender pay gap these days. One important factor is that women tend not to renegotiate wages or be assertive when they are negotiating. Men tend to be better at those sorts of things. So, you receive what you ask for, and if you don't ask for more, you don't receive more.