Women with graduate degrees are more attractive

For those who like social statistics:

"As late as the 1980s, according to economist Elaina Rose, women with PhDs or the equivalent were less likely to marry than women with a high school degree. But the "marital penalty" for highly educated women has declined steadily since then, and by 2000 it had disappeared. Today, women with a college degree or higher are more likely to marry than women with less education and lower earnings potential. Highly educated women are also now as likely to have children as their less-educated counterparts -- and much more likely to have children born in wedlock."

Taken from Greg Mankiw's Blog