So in 1995 Jaak Panksepp, a neuroscientist at Bowling Green State University, Ohio, decided to see if the anecdotes were true.

ECONOMIST: The biology of music | The

In 2006, 1.8 million Americans aged 50 and above lived in heterosexual "unmarried-partner households, " a 50% increase from 2000, figures Bowling Green State University demographer Susan Brown.

FORBES: The Second Match

Research by Wendy Manning of Bowling Green State University and others shows that unmarried Mexican-American couples who have children while living together are slightly more likely to break up than are blacks or whites in similar circumstances.

ECONOMIST: Hispanic families