A study conducted by scientists at the Queen Mary University of London involved the analysis of 2.6 million posts on the well-known social networking site, Nextdoor. Surprisingly, they were able to predict a user’s income accurately, using only the content of their posts.
Well, the content from Nextdoor would be very specific to the income level, so…
I’d be more impressed if they could do that with a number of random Reddit comments, for example.