This paper reports an exercise in adversarial collaboration. An adversarial collaboration is an investigation carried out jointly by two individuals or research groups who, having proposed conflicting hypotheses, seek to resolve the issue in dispute. The experiment reported was designed to...

We apply a novel crowdsourcing approach to provide rapid insights on the most promising interventions to promote uptake of COVID-19 booster vaccines. In the first stage, international experts proposed 46 unique interventions. To reduce noise and potential bias, in the second stage, experts and...

On the basis of data from many nations, our forthcoming book asks and answers a question pressing in democratic and nondemocratic nations alike: What do citizens actually think about behaviorally informed policies?