Mark Hoffman is a PhD student in Sociology at Columbia University. He is currently developing methods for analyzing social networks over time and for relating network structure to individual and group-level outcomes. He is also working on a project with Adam Reich, Noam Zerubavel and Peter Bearman that uses methods from cognitive neuroscience to better understand how social relations are encoded at the level of the brain. In future work, he hopes to further explore how neuroscience can help researchers understand the various mechanisms producing commonly observed network structures. He received his BA in Social Research and Public Policy from New York University Abu Dhabi.