Doctoral student Jameson Toole, a member of Professor Marta González‘s research group, is the subject of a feature article on MIT News, “Making Sense of Big Data.” Toole works with large data sets, often collected from cellphones, to create models of transportation and online community networks. For instance, he and González recently modeled the contagion process of Twitter in its early years, showing that the early growth of the online social networking site relied on traditional social networks of geographic proximity and socioeconomic similarity.