So okay, women don't make $0.77 for every dollar men earn. If we discard all the stuff the GAO found that definitely isn't related, women make $0.93 for every dollar men earn. So, is that somehow okay because it's "only" 7 cents?
As the previous studies cited were a 1993 study and a 1999 study covering Sweden, I thought it might be important to add some modern statistics into the mix.
The interesting part to me is on pages 84-86. If you look, you'll see the pay gap resulting from characteristics such as experience, difference in education, and difference in occupation (the three most usually cited to explain the wage gap) have narrowed significantly.
This is important because it showcases a societal shift in workforce population, from a 'glass ceiling' problem to a far more difficult one that is harder to define and fix.
http://www.gao.gov/new.items/d09279.pdf