He analyzes large datasets of online behaviour, bringing a computational perspective to questions about decision making, community dynamics, and systemic bias. Throughout his career he has collaborated with many companies, including Facebook, Google, and LinkedIn, and his work has appeared in several high-profile journals and conferences, including the Proceedings of the National Academy of Sciences, Management Science, and The Web Conference. Before joining the University of Toronto, he completed his PhD at Stanford and was a postdoctoral researcher at Microsoft Research NYC.