If you’ve managed to make it this far in life without quite figuring out what demographic boxes to tick on the Census form, a recent working paper published by the National Bureau of Economic Research might have some clues for you. According to the Washington Post, University of Chicago economists Marianne Bertrand and Emir Kamenica “taught machines to guess a person’s income, political ideology, race, education, and gender based on either their media habits, their consumer behavior, their social and political beliefs, and even how they spent their time.” The results are, at times, surprisingly granular and seemingly nonsensical: Owning...