What an hour a day boughtDeactivation freed up sixty minutes a day for the average person in the paid group. News knowledge fell by 0.19 standard deviations, a bigger movement than the wellbeing gain, and self-reported time spent on news dropped by around fifteen per cent. The overall polarisation index fell too, by 0.16 standard deviations, driven mostly by reduced exposure to news that flattered people’s own side and a narrowing of views on policy issues. A month after the study closed, the treatment group reported about twelve fewer minutes a day on the Facebook mobile app, close to a quarter less than controls. That figure has been reported ever since as the price of Facebook.