“Governing in the face of a global crisis: When do voters punish and reward incumbent governments?”, Proceedings of the National Academy of Sciences (2025).
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“Inequality in COVID-19 vaccine acceptance and uptake: A repeated cross-sectional analysis of COVID vaccine acceptance and uptake in 13 countries”, Health Policy (2025).
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“The 2024 U.S. Presidential Election PoSSUM Poll” (with Roberto Cerina), PS: Political Science & Politics (2024).
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“Access to healthcare services during the COVID-19 pandemic: A cross-sectional analysis of income and user-access across 16 economically diverse countries”, BMC Public Health (2024).
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“How to detect heterogeneity in conjoint experiments” (with Thomas S. Robinson), Journal of Politics (2024).
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Online Appendix
Replication Data
“Deepfake detection with and without content warnings” (with Andrew Lewis, Patrick Vu, and Areeq Chowdhury), Royal Society Open Science (November 2023).
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“Financial Incentives for COVID-19 Vaccines in a Rural Low-Resource Setting: a Cluster-Randomized Trial” (with Edward Asiedu et al), Nature Medicine (November 2023).
AbstractVideo
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Replication Data
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We implemented a clustered randomized controlled trial with 6,963 residents in six rural Ghana districts to estimate the causal impact of financial incentives on coronavirus disease 2019 (COVID-19) vaccination uptake. Villages randomly received one of four video treatment arms: a placebo, a standard health message, a high cash incentive (60 Ghana cedis) and a low cash incentive (20 Ghana cedis). For the first co-primary outcome—COVID-19 vaccination intentions—non-vaccinated participants assigned to the cash incentive treatments had an average rate of 81% (1,733 of 2,168) compared to 71% (1,895 of 2,669) for those in the placebo treatment arm. For the other co-primary outcome of self-reported vaccinations 2 months after the initial intervention, the average rate for participants in the cash treatment was 3.5% higher than for participants in the placebo treatment (95% confidence interval (CI): 0.001, 6.9; P=0.045): 40% (602 of 1,486) versus 36.3% (672 of 1,850). We also verified vaccination status of participants: in the cash treatment arm, 36.6% (355 of 1,058) of verified participants had at least one dose of the COVID-19 vaccine compared to 30.3% (439 of 1,544) for those in the placebo—a difference of 6.3% (95% CI: 2.4, 10.2; P=0.001). For the intention and the vaccination outcomes, the low cash incentive (20 Ghana cedis) had a larger positive effect on COVID-19 vaccine uptake than the high cash incentive (60 Ghana cedis). Trial identifier:
AEARCTR-0008775.
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"Efficient Randomized Experiments Using Foundation Models" (with Piersilvio De Bartolomeis, Javier Abad, Guanbo Wang, Konstantin Donhauser, Fanny Yang, Issa J. Dahabreh), 2025.
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“Economic Beliefs and the Local Coronavirus Pandemic” (with Thomas Robinson and Peiran Jiao), 2020.
“Understanding Exponential Growth Amid Pandemic: An International Perspective” (with Alexander Podkul, Kevin DeLuca, Eduard Krkoska, Stephen Ansolabehere, Scott Tranter, and Liberty Vittert), 2020 [Under Review].
“Pivotal Decision Making, Agenda Power and Collective Responsibility Attribution” (with Rodrigo Caputo), Working Paper, Nuffield Centre for Experimental Social Sciences, 2020 [Under Review].
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“The Moral Cost of Lying” (with Denise Laroze and Alexei Zakharov), Working Paper, Nuffield College Centre for Experimental Social Sciences, 2020 [Under Review].
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“U.S. Economic Policy Uncertainty is Presidential” (with Rodrigo Caputo), Working Paper, Nuffield College Centre for Experimental Social Sciences, 2019 [Under Review].
