Until a vaccine is widely available, face masks and other nonpharmaceutical interventions (NPIs) will continue to be the frontline defense against Covid-19 in developing countries. But their effectiveness depends critically on compliance by young adults, who are most likely both to become...

This study investigates the effectiveness of dynamic norm nudges in promoting second-dose HPV vaccinations among trendsetters-parents who initiated the firstdose HPV vaccine for their daughters between 2017-2020. Utilizing administrative data from Bogota's Secretariat of Health in a field...