The Impact of Large-Scale Social Media Advertising Campaigns on COVID-19 Vaccination: Evidence from Two Randomized Controlled Trials Bằng Ho, Lisa, Breza, Emily, Banerjee, Abhijit, Chandrasekhar, Arun G., Stanford, Fatima C., 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, Alsan, Marcella

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