Thank you for providing the motivation to find this information. By the way, "data" tells us nothing. All data must be interpreted. Any two social scientists can provide contradictory analyses for the same data set.

What pay gap? Young women out-earn men in cities, conservative pundit claims
http://www.politifact.com/punditfact/statements/2014/apr/09/genevieve-wood/what-pay-gap-young-women-out-earn-men-cities-gop-p/

Here's a little side issue: "PolitiFact has given you the nuts and bolts about the 77 cents statistic -- you can read the two most important works in this area here and here. Basically, there is a wage gap, but it tends to disappear when you compare women and men in the exact same jobs who have the same levels of experience and education." 

Well. Isn't that interesting.