This paper investigates the finding that reported life satisfaction scores are significantly higher in the German Socio-Economic Panel when a third person is present during the interview. Even after controlling a variety of relevant factors, third person presence makes up a significant...

Selective attrition out of longitudinal datasets is a concern for empirical researchers. This paper discusses a simple way to identify both direction and magnitude of potential sample bias in household panels. The idea is to exploit multiple types of simultaneous entries into the panel. The...