We examine the degree to which factors associated with workers' union membership decisions are sensitive to shifts in the institutional environment of unions. Comparative logit analyses of the relationship between potential determinants of membership and actual union membership over time suggest...

The current paper clarifies the value of two methods to encourage COVID-19 vaccination: Simple nudge reminders, and regulation that increases the benefit from vaccination. Our analysis of reminders is based on a controlled experiment. The results reveal that in the current context a reminder...