Why do they think women are worth less than men?

An article today by the Associated Press cites a study that found that women earn only 80 percent of what their male peers earn one year after college.

Then it gets even worse.

10 years after college, women earn only 69 percent of what men earn.

The study was conducted by the American Association of University Women Educational Foundation.

The article goes on to say:

Even after controlling for hours, occupation, parenthood, and other factors known to affect earnings, the study found that one-quarter of the pay gap remains unexplained. The group said that portion of the gap is "likely due to sex discrimination."

So there it is.

Sex discrimination.

Employers believe that women should be paid less than men for performing the same job.

What century is this?