I have citations somewhere. I'll post them when I come across them. You might also want to look at "comparable worth" literature -- nice discussion of the social factors that go into valuing labor by different groups. (Obviously, for example, many CEOs and high-level executives aren't worth what they are paid but they can command such salaries since the executive compensation is often set by very incestuous small networks often composed of other executives).
I, too, will be interested to see comparable worth estimates because some of those studies are very good and some of those studies don't control for factors that have little or nothing to do with gender, yet show a very clear gender-bias because of inadequate study design.
