No photo? Big age gap? Don’t be stupid, cupid -- no wonder nobody’s swiping right.

In a new study led by University of Michigan sociologist Dr. Elizabeth Bruch, researchers present a statistical model that describes the process of mate selection in online dating. The researchers, who looked at 1,855 users of an online dating site, analyzed why cyber singles choose to look at and message certain potential partners. You can read the full study online, but here are some its most interesting -- and obvious -- takeaways: