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Women college graduates are not sticking to traditional compatibility traits when choosing a husband, according to one study. Preferences are changing as economics play a larger role.

American Institute for Boys and Men data say female college graduates have difficulty finding equally-educated partners.

University of Indianapolis Sociology Professor Amanda Miller, PhD, said historically, college-educated women married within the same circles.

Instead of foregoing marriage entirely, Miller explained, more are deciding on "exogamy" - marrying outside their social group.

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"They're dipping down into a group of men who do not have a college education, but who do make a good living financially," said Miller. "College-educated women - if they can't find a man who has a degree - they're marrying, for example, someone who's a general contractor and has his own business, or a union pipefitter who makes a really good living."

The study found that marriage rates for college-educated women remain stable, even as their primary partners -- college-educated men -- become scarce.

Only about 50 percent of college-educated women marry a man at the same education level, while roughly 25 percent marry someone without a college degree. Another 25 percent remain single.

According to the research site World Population Review, in Indiana 50 percent of men and almost 48 percent of women are married.

Miller said remaining single or having a baby out of wedlock no longer carries the stigma it has in previous generations.

She added that the "working class" often has conservative or very traditional family values, and most people's beliefs and behaviors don't always go together.

"So, if you ask people with a high school diploma or perhaps an associate's degree or some college, 'Is it okay to have a baby out of wedlock? Is it okay to get divorced? Is it okay to cohabit?'" said Miller, "their answer is often 'no.' The flip side happens when we talk to the college-educated - they don't actually do those things themselves."

Miller also noted a decrease in women out-earning or being more educated than their husbands.

She observed that as college-educated women choose to marry men without college degrees, fewer working-class men marry women of a similar background.