ask to donate is at least as effective as offering social recognition. A survey experiment with blood donors indicates …

randomized online field experiments (RCTs). During the first experiment, we collected data from 4,188 users on Facebook and …. During the second experiment, we collected data from a representative sample of the population and observed them across three … waves. Results: The results from the first experiment support the hypotheses that the bystander program motivates people to …

that offer social recognition. A survey experiment with blood donors provides consistent evidence that social recognition …

This paper assesses the results of an experiment designed to identify discrimination in users' following behavior on …

discourage future contributions? To assess this, we use a randomized field experiment which added content to some pages in …