Graduate online dating
Besides photographs, each user's profile could include any number of personal details including age, height, weight, education, marital status, number of children, and smoking and drinking habits.
The data set includes some 1.1 million interactions between users.
But beyond someone's looks, how much do any of these factors matter for mate selection?
One complication is that online daters are not making just one decision, but several in a series: First, people are swiping their way through profiles and deciding which to dismiss immediately or browse more closely.
A team led by Elizabeth Bruch, a sociologist at the University of Michigan, Ann Arbor, tapped into this torrent of dating data.
Because of a nondisclosure agreement, the researchers can't reveal the exact source of their subjects, describing it only as an "established, marriage-oriented, subscription-based dating site" from which they randomly selected 1855 people, all based in New York City.
"The guys place the same priority on education and the same passion for their careers as I do," Hirner said.Those 30 million people have generated billions of pieces of data.