2nd to last paragraph: At every education level, from high-school dropouts to Ph.D.s, women continue to earn less than their male peers.
That's what happens when an editor writes the article title without reading the full article I guess. Maybe it's just me but I don't know I agree with the assumption that two individuals, one with a college degree and the other without, are really in the same peer group when it comes to salary.
When you pair up people by age and relationship status, young women come out ahead. More than that, I'm quite sure that if you pair up women and men by the socio-economic background of their parents, and the neighborhoods they grew up in, more often than not the women are coming out ahead. That is a fair peer comparison. And will have interesting effects on, for instance, dating dynamics.
The fact that there is a different way to peer people with different results is interesting as well, and helps explain how this fits with the widely known observation that women make less than men in virtually every job.
I agree, the word "peer" is used very loosely here when comparing salaries. In fact, I wouldn't even say two individuals with the same "degree level" are necessarily in the same "peer group" when it comes to salary. A nurse practitioner has an MS, typically. So (often) does a social worker. Someone might have an MS in engineering or creative writing. No real point in grouping these all together.