This paper explores the potential of an approach suggested by Manski of obtaining nonparametric bounds for treatment effects in evaluation studies without knowledge of the participation process. The practical concern is the effects of continuous vocational training in East Germany. The empirical...

This paper establishes that individuals with an internal locus of control, i.e., who believe that reinforcement in life comes from their own actions instead of being determined by luck or destiny, earn higher wages. However, this positive effect only translates into labor income via the channel...

In this paper, we examine how orphanhood affects children's educational and health outcomes in eleven sub-Saharan African countries. Our analysis is based on a comparison of orphans and non-orphaned children living under the same conditions. We also examine the impacts of various family...

Register data are known for their large sample size and good data quality. The measurement accuracy of variables highly depends on their high importance for administrative processes. The education variable in the IAB employment sub-sample is an example for information that is gathered without a...

Gregariousness is an important aspect of human life with implications for labour market outcomes. The paper examines, to the best of our knowledge for the first time for Germany, gregariousness and social interaction at the workplace and associated wage differentials. Our empirical findings with...

Despite the interdependence between cognitive and noncognitive skills, empirical studies have shown a longer period of acquisition in life-time for the latter besides relevance for educational and labor market success. Analyzing returns of investments during different periods of life is...

We identify effects of age at school entry (ASE) on the development of child temperament. Our analysis is based on psychometric measures from a longitudinal cohort study of children in the Rhine-Neckar region in central Germany. In children with a higher ASE due to a birthday late in the year,...

This paper studies how cognitive and social skills in childhood are related to the duration of unemployment in adolescence and early adulthood. I estimate a flexible proportional hazard rate model for the probability of making a transition from unemployment to employment during an individual's...

Firms invest huge amounts into intangible assets. This paper explores to which extent different kinds of intangible assets are conducive to firm-level productivity. Our study contributes to the literature by simultaneously comparing productivity effects of innovative capital, human capital,...

This paper analyzes the impact of information and communication technologies (ICT) on economic growth in developing, emerging and developed countries. It is based on a sample of 59 countries for the period 1995 to 2010. Various panel data regressions confirm the positive relationship between ICT...