Your telephone may know more about your private life than you do, according to a new study of mobile phone calls. The insight opens the door to mining massive data sets from mobile phone call logs, which should allow researchers to test theories for how relationship networks make or break businesses, shape the flow of information, and even affect the course of epidemics.
A nagging problem for social scientists is the limitation of self-reported survey data. Not only are people expensive to poll, but they are also notoriously error-prone when...