Hi. I’m an Assistant Professor at Stanford in the Management Science & Engineering Department (in the School of Engineering). I also have courtesy appointments in Sociology and Computer Science. My primary area of research is computational social science, an emerging discipline at the intersection of computer science, statistics, and the social sciences. I’m particularly interested in applying modern computational and statistical techniques to study and design public policy. For example, I’ve recently been looking at stop-and-frisk, swing voting, filter bubbles, do-not-track, and media bias.

I also direct the Data Science Drop-in, a free educational and consulting service for members of the Stanford community. We provide help on all aspects of data collection, cleaning, analysis, and visualization.

I studied at the University of Chicago (B.S. in mathematics) and at Cornell (M.S. in computer science; Ph.D. in applied mathematics), and was a postdoc in the Stanford math department. Before joining the Stanford faculty, I worked as a Senior Researcher at Yahoo Labs and Microsoft Research in New York City.

If you would like to chat, please stop by my office at HEC 356, or send me an .