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    • The Impact of Large-Scale Social Media Advertising Campaigns on COVID-19 Vaccination: Evidence from Two Randomized Controlled Trials 

      Ho, Lisa; Breza, Emily; Alsan, Marcella; Banerjee, Abhijit; Chandrasekhar, Arun G.; Stanford, Fatima; Fior, Renato; Goldsmith-Pinkham, Paul; Holland, Kelly; Hoppe, Emily; Jean, Louis-Maël; Ogbu-Nwobodo, Lucy; Olken, Benjamin A.; Torres, Carlos; Vautrey, Pierre-Luc; Warner, Erica; Duflo, Esther (Harvard Kennedy School, 2022-11)
      COVID-19 vaccines are widely available in wealthy countries, yet many people remain unvaccinated. Understanding the effectiveness -- or lack thereof -- of popular vaccination campaign strategies is therefore critical. In ...