NEW YORK (AP) -- A new study says women start losing ground to men on pay almost as soon as they enter the workforce.
The American Association of University Women Educational Foundation says one year after college, women are making only 80 percent of their male peers.
And after ten years, the study says the gap grows to 69 percent.
The foundation says part of the wage difference is a result of people's choices, and part is employers' assumptions about what women will do.
Even after controlling factors known to affect earnings -- such as hours, occupation, and parenthood -- the study found one-quarter of the pay gap remains unexplained.
The foundation thinks that portion is sex discrimination.