In this paper, human capital investments are evaluated by assuming heterogeneous returns to education. We use the potential outcome approach to measure the causal effect of human capital investments on earnings as a continuous treatment effect. Empirical evidence is based on a sample of West...

This paper investigates whether firms innovate persistently or discontinuously over time using an innovation panel data set on German manufacturing and service firms for the period 1994?2002. We find that innovation behaviour is permanent at the firm?level to a very large extent. Using a dynamic...

High performance workplace practices were extolled as an efficient means to increase firm productivity. The empirical evidence is disputed, however. To assess the productivity effects of a broad variety of measures, we simultaneously account for both unobserved heterogeneity and endogeneity...

This paper analyses the duration of child poverty in Germany. In our sample, we observe the entire income history from the individuals' birth to their coming of age at age 18. Therefor we are able to analyze dynamics in and out of poverty for the entire population of children, wether they become...

This paper investigates the form and magnitude of a variety of state dependence effects for prime-aged men in Germany. I differentiate between three labor market states: employment, unemployment, and out of labor force. Results indicate that all forms of state dependence are present in the data,...

The present paper examines the joint effect of fixed-term employment and work organization on job satisfaction using individual-level data from the German Socio-Economic Panel (GSOEP). Specifically, we analyze whether workers who are heterogeneous in terms of the type of working contract...

Based on a multiple spells approach, this paper studies the extent and the composition of chronic poverty in Germany. The results indicate that about one third of cross-sectional poverty in a given year is chronic. The characteristics that are most closely associated with long-term poverty are...

We apply a recently proposed method to disentangle unobserved heterogeneity from risk in returns to education. We replicate the original study on US men and extend to US women, UK men and German men. Most original results are not robust. A college education cannot universally be considered an...