Nonresponse in surveys may result in a distortion of the distribution of interest. In a panel survey the participation behavior in later waves is different from the participation behavior at the start. With register data that cover also the information for non-respondents one can observe a fade...

Comparative analyses frequently examine respondents' self-rated health (SRH), assuming that it is a valid and comparable measure of generic health. However, given SRH's vagueness, this assumption is questionable due to (1) manifold non-health influences, such as personal characteristics...