I am an Assistant Professor of Political Science at the University of Copenhagen and Center for Social Data Science. I was a post-doctoral researcher at the Center for Social Media and Politics at New York University, and I have a PhD from the University of Toronto. I conduct research on political behavior, social media, and quantitative methods.

I was a partner at, and currently am an advisor for Vox Pop Labs, a company that works with media organizations (e.g. Wall Street Journal, Sky News UK, CBC, ABC) to provide applications that promote political literacy. We are best known for Vote Compass, an application used by millions of voters in recent elections.

Publications

Exposure to the Russian Internet Research Agency Foreign Influence Campaign on Twitter in the 2016 US Election and its Relationship to Attitudes and Voting Behavior
Nature Communcations. 2023, 14 (62).
(with Tom Paskhalis, Jan Zilinsky, Richard Bonneau, Jonathan Nagler, and Joshua Tucker)

Do Violent Protests Affect Expressions of Party Identity? Evidence from the Capitol Insurrection
American Political Science Review. Forthcoming.
(with Frederik Hjorth and Peter Thisted Dinesen)
Replication data

The Unequal Effects of the COVID-19 Pandemic on Political Interest Representation
Political Behavior. Forthcoming.
(with Anne Rasmussen)

Does International Terrorism affect Public Attitudes toward Refugees? Evidence from a Large-scale Natural Experiment
Journal of Politics. 2022, 84 (1).
(with Charles Breton)
Replication data

Measuring Uncertainty about Candidate Ideology: An Application to US Presidential Elections
Journal of Politics. 2021, 83 (2).
(with Peter Loewen)
Replication data

Cross-Platform State Propaganda: Russian Trolls on Twitter and YouTube during the 2016 US Presidential Election
International Journal of Press/Politics. 2020, 25 (3).
(with Yevgeniy Golovchenko, Cody Buntain, Megan Brown, and Joshua Tucker)

Presidential Greatness in a Polarized Era: Results from the Latest Presidential Greatness Survey
PS: Political Science & Politics. 2020, 53 (3).
(with Brandon Rottinghaus and Justin S. Vaughn)

How Many People Live in Political Bubbles on Social Media? Evidence from Linked Survey and Twitter Data.
SAGE Open. 2019, 9 (1).
(with Jonathan Nagler, Andrew Guess, Joshua Tucker, and Jan Zilinsky)

Statistical Analysis of Misreporting on Sensitive Survey Questions.
Political Analysis. 2017, 25 (2).
Replication data • Statistical software • Software vignette

Statistical software

mediascores
News-sharing Ideology from Social Media Link Data
Software vignette

misreport
Statistical Analysis of Misreporting on Sensitive Survey Questions
Software vignette • Academic article

Vox Pop Labs

I was a partner at, and currently am an advisor for Vox Pop Labs, a political engagement and public opinion research firm that brings social science to the public through civic education applications. Our partners include Vox.com, the Wall Street Journal, Sky News (UK), the Canadian Broadcasting Corporation (CBC), RTL (Germany), France 24, the Australian Broadcasting Corporation (ABC), and TV New Zealand. Vox Pop Labs' most popular application, Vote Compass, has been used by tens of millions of voters, providing them with information about the positions of the political parties on a wide array of issues.

Recent public writing

International terrorism decreases public support for refugee resettlement, but not for long
Journal of Politics Blog. January 22, 2022.
(with Charles Breton)

The Jan. 6 riot at the Capitol hurt the Republican Party, new research finds
Washington Post. July 16, 2021.
(with Frederik Hjorth and Peter Thisted Dinesen)

Trying to understand Jeff Flake? We analyzed his Twitter feed — and were surprised
Washington Post. October 5, 2018.
(with Jan Zilinsky, Jonathan Nagler, and Joshua Tucker)
Methodological supplement

Comparing Trump to the greatest—and the most polarizing—presidents in US history
Brookings. March 20, 2018.
(with Brandon Rottinghaus, and Justin S. Vaughn)