Birger tells of a friend who moved to Aspen in Pitkin County, which has 22 percent more college-educated men than college-educated women among those 34 and under. The first weekend his friend visited, a man asked her out at a bar, and she met her husband eight days after moving to Aspen.

There are 5.5 million college-educated women in the United States between the ages of 22 and 29 compared to only 4.1 million men, according to U.S. Census Bureau, so there are four women for every three men among college graduates.

For college graduates ages 30 to 39, there are 7.4 million women compared to 6.0 million men, which is five women for every four men. How lopsided this ratio is in a particular place varies dramatically.

Information and awareness are key catalysts to solving this market inefficiency. As more people learn about the numbers game “Date-onomics” reveals, the ratios could even out as college-educated women hoping to marry choose to relocate to cities where their odds are better.