Sean Jeremy Westwood

|Associate Professor
Academic Appointments

Associate Professor of Government

I am an Associate Professor in the Department of Government at Dartmouth College. I study political behavior and public opinion, examining how partisanship and information from political elites affect the behavior of citizens. My work focuses on understanding where partisan biases originate, where they manifest (inside and outside political domains), and their bounds.

My work has been covered by The New York Times, Washington Post, Wall Street Journal, Slate, Vox, Foreign Affairs, New Republic, Newsweek, ABC, CBS, CNN, Fortune, Financial Times, Bloomberg, NPR, New York Magazine, USA Today and other local outlets.


Silsby, Room 210
HB 6108




  • B.A. University of Nevada
  • M.S. The London School Economics and Political Science
  • MA Stanford University
  • PhD Stanford University

Selected Publications

  • Westwood, S., & Peterson, E. (in press). The inseparability of race and partisanship in theunited states. Political Behavior.

    Westwood, S., Messing, S., & Lelkes, Y. (2020). Projecting confidence: How the probabilistic horserace confuses and demobilizes the public. Journal of Politics.

    Mummolo, J., Peterson, E., & Westwood, S. (2019). The limits of partisan loyalty. Political Behavior, 1–24.

    Westwood, S. J., Peterson, E., & Lelkes, Y. (2019). Are there still limits on partisan prejudice? Public Opinion Quarterly, 83(3), 584–597.

    Iyengar, S., Lelkes, Y., Levendusky, M., Malhotra, N., & Westwood, S. J. (2019). The origins and consequences of affective polarization in the united states. Annual Review of Political Science, 22, 129–146.

    Cottrell, D., Herron, M. C., & Westwood, S. J. (2018). An exploration of donald trump’s allegations of massive voter fraud in the 2016 general election. Electoral Studies, 51, 123–142.

    Grimmer, J., Messing, S., & Westwood, S. J. (2017). Estimating heterogeneous treatment effects and the effects of heterogeneous treatments with ensemble methods. Political Analysis, 25(4), 413–434.

    Westwood, S. J., Iyengar, S., Walgrave, S., Leonisio, R., Miller, L., & Strijbis, O. (2018). The tie that divides: Cross-national evidence of the primacy of partyism. European Journal of Political Research, 57(2), 333–354.

    Lelkes, Y., & Westwood, S. J. (2017). The limits of partisan prejudice. The Journal of Politics, 79(2), 485-501.

    Iyengar, S., & Westwood, S. J. (2015). Fear and loathing across party lines: New evidence on group polarization. American Journal of Political Science, 59(3), 690–707.

    Westwood, S. J. (2015). The role of persuasion in deliberative opinion change. Political Communication, 32(4), 509-528.

    Lottridge, D. M., Rosakranse, C., Oh, C. S., Westwood, S. J., Baldoni, K. A., Mann, A. S., & Nass, C. I. (2015). The effects of chronic multitasking on analytical writing. Proceedings of the 33rd Annual ACM Conference on Human Factors in Computing.

    Messing, S., & Westwood, S. J. (2014). Selective exposure in the age of social media. Communication Research, 41(8), 1042-1063.

    Grimmer, J., Messing, S., & Westwood, S. J. (2012). How words and money cultivate a personal vote: The effect of legislator credit claiming on constituent credit allocation. American Political Science Review, 106(4), 703719.