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...

This work offers new insights into the determinants of service offshoring across countries and across service industries. Combining different data sources over the 2006-2009 period, I find that certain country characteristics affect offshoring costs for all services, while the effects of other...