Policy makers increasingly use choice defaults to promote `good' causes by influencing socially relevant decisions in desirable ways, e.g., to increase pro-environmental choices or pro-social behavior in general. Such default nudges are remarkably successful when judged by their effects on the...

This paper reports evidence from a field experiment investigating households' electricity saving behavior. We motivated households' efforts to save electricity via pro-environmental incentives that did not affect people's monetary utility but targeted their environmental preferences. The results...