I am an Assistant Professor at the School of International and Public Affairs and a Faculty Member at the Data Science Institute and the Saltzman Institute of War and Peace Studies at Columbia University. My research applies machine learning and text analysis methods to study political behavior in the digital age.

A large portion of my work focuses on political violence and extremism. Drawing on rich data on the online behavior of millions of individuals on various social media platforms, I examine how online engagement with extremist content is shaped by events in the offline world; how terrorist propaganda radicalizes targeted audiences; and the way in which exposure to hate speech and disinformation shapes radicalization outcomes. In other projects, I examine how race and ethnicity influence public perceptions, as well as the outcomes of nonviolent protests, and the way in which exposure to violent conflict influences political attitudes and behavior.

Another part of my research examines the role of media in politics more broadly. In several projects focusing on right-wing populism, I study how far-right politicians mobilize supporters on social media, and how ‘alternative’ online platforms serve as vehicles for the spread of far-right propaganda. In other projects, I study the way in which political leaders shape media content to advance electoral goals, and examine the impact of online content on citizens’ political behavior, both online and offline.

My work has been published in the American Political Science Review, International Organization, the Journal of Economic Perspectives, and Political Science Research and Methods, among other outlets.

I hold M.A., M.Phil., and Ph.D. in Political Science from Columbia University and a B.A., summa cum laude, in Politics with Highest Honors from New York University.