How to explain the college and post-college hook-up culture? Why are there so many wonderful single straight women who can't find a man to date, let alone marry? How can this be, when at birth there are more boys than girls? Business journalist Jon Birger explains it all, in this mesmerising and surprising interpretation of demographic data. The pill, Title IX, the changing job market, the souring economy, the social and psychological advantages that littles girls have in elementary school—all these things have contributed to soaring college admissions for young women ... and diminished chances that these same women will find long-term heterosexual relationships. Full of anecdotes, startling statistics, and witty insights, Date-onomics will be THE dinner party topic for months and years to come.