This core protocol for ECDC studies of VE against hospitalisation with severe acute respiratory infection (SARI) laboratory-confirmed with SARS-CoV-2 or with influenza, version 4.0, represents an update to the main elements for a multi-country hospital-based study of COVID-19 vaccine...

Whether monetary incentives to change behavior work and how they should be structured are fundamental economic questions. We overcome typical data limitations in a large-scale field experiment on vaccination (N = 5, 324) with a unique combi-nation of administrative and survey data. We find...

Whether monetary incentives to change behavior work and how they should be structured are fundamental economic questions. We overcome typical data limitations in a large-scale field experiment on vaccination (N = 5, 324) with a unique combination of administrative and survey data. We find that...