[W]hy rely on anecdotes when you have data? We analyzed de-identified posts and comments posted on Facebook in the last week of May with at least one string of characters matching laughter1. We did the matching with regular expressions which automatically identified laughter in the text, including variants of haha, hehe, emoji, and lol2.
As denizens of the Internet will know, laughter is quite common: 15% of people included laughter in a post or comment that week. The most common laugh is haha, followed by various emoji and hehe. Age, gender and geographic location play a role in laughter type and length: young people and women prefer emoji, whereas men prefer longer hehes. People in Chicago and New York prefer emoji, while Seattle and San Francisco prefer hahas.