In this paper we show that findings of an apparently instable popularity function of U.S. presidents, as reported in the previous literature, are likely the consequence of the common use of linear estimation techniques. Employing Penalized Spline Smoothing in the context of Additive Mixed Models...

It is standardly assumed that individuals adjust to perceived unfairness or norm violations in precisely the same area or relationship where the original offense has occurred. However, grievances over being exposed to injustice may have even broader consequences and also spill over to other...