http://www.chicagotribune.com/lifestyles/ct-online-dating-out-of-league-20180808-story.html

Some fun parts:

The scientists measured the number of words per initial message and the message response rate. Men wrote more first messages than women, and women were less likely to respond to a message. Men and women also wrote longer messages to potential dates who were more desirable, the study said. The number of words in a message, however, did not correlate to response, even when controlled for the desirability gap. In other words, a one-word message (let's say, "hiiiii") was just as likely to get a response as a long agonized line of Pablo Neruda poetry (I want / To do with you what spring does with a cherry tree"). This raises the obvious, if controversial question: Is it better to just say, "Hey."

A few other findings from the study: "Older women are less desirable, while older men are more so," the authors found. "Postgraduate education is associated with decreased desirability among women." Women's desirability peaked at the youngest age possible to join the dating app - 18 - and declined until age 60. Men's desirability increased until 50. It is important to note, particularly for everyone who's not an 18-year-old woman or a middle-aged white man, that the study results were based on averages, and there is a wide range in what people are looking for in a date.