content: Thanks for all the info. I spent some time reading some those links and I came across this meta analysis of the wage gap http://www.jstor.org/stable/3558999?seq=1#page_scan_tab_contents This is from the conclusion of the paper for those that want a summary: "Lastly,substituting the current year (2003 or Year = 33) into this MRA model estimates  gender wage discrimination to be 0.0597, or 6.2 percent of the female wage...A 95 percent prediction interval for this regression forecast goes from 0.4 percent to 12.2 percent. Thus, research on gender wage discrimination still finds significant  discrimination-but not for long at the current rate of decline (0.6 percent  per year). "