2024 A Field Experiment Using Social Media Ads to Encourage COVID-19 Vaccination Olgahan Çat, Jiseon Chang, Roman Hlatky, and 2 more authors Accepted at PNAS Nexus, 2024 2023 Aiding War: Foreign Aid and the Intensity of Violent Armed Conflict Michael Findley, Joseph K Young, Daniel Strandow, and 1 more author International Studies Quarterly, 2023