Whereas the number of paid overtime hours declined over the last decade, a different trend can be observed for unpaid overtime work in Germany. We look at the future consequences for overtime workers, and therefore investigate the investment character of working time. We examine whether unpaid...

Whereas the number of paid overtime hours declined over the last two decades in Germany, a different trend can be observed for unpaid overtime. We analyze future consequences of unpaid work with respect to a worker's career advancement, such as higher future wages and probabilities of promotion...

We provide the first joint evidence on the relationship between individuals' cognitive abilities, their personality and earnings for Germany. Using data from the German Socio-Economic Panel Study, we employ scores from an ultra-short IQ-test and a set of measures of personality traits, namely...

Empirical studies on the earnings effects of tobacco use have found significant wage penalties attached to smoking. This article produces evidence that suggests that these estimates are significantly upward biased. The bias arises from a general failure in the literature to control for past...

We provide the first joint evidence on the relationship between individuals' cognitive abilities, their personality and earnings for Germany. Using data from the German Socio-Economic Panel Study, we employ scores from an ultra-short IQ-test and a set of measures of personality traits, namely...

This paper exploits a reform that facilitated the recognition of foreign occupational qualifications for non-EU immigrants in Germany. Using detailed administrative social security and survey data in a dfference-in-differences design, we find that the reform increased the share of non-EU...