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I won't bother responding to your first reply.

To the second, your linked article cites a study that does not control for hours worked, choice of field, or most importantly being in an equivalent position, which I specified in my comment.

Here's the wiki article on the gender pay gap and a relevant quote:

http://en.wikipedia.org/wiki/Male%E2%80%93female_income_disp...

However, in 2010, an economist testified to the U.S. Congress Joint Economic Committee that studies "always find that some portion of the wage gap is unexplained" even after controlling for measurable factors that are assumed to influence earnings. The unexplained portion of the wage gap is attributed by some to gender discrimination.