To give you just one sense of the mastery of Mullainathan’s machine, it flagged 1 percent of all the defendants as “high risk.” These are the people the computer thought should never be released prior to trial. According to the machine’s calculations, well over half of the people in that high-risk group would commit another crime if let out on bail. When the human judges looked at that same group of bad apples, though, they didn’t identify them as dangerous at all. They released 48.5 percent of them!
