"This paper analyses the (self-)selection of migrants between countries which have substantial differences in the inequality of earnings and income levels. In an extended version of the Roy-model we consider migration costs, which tend to grow less than proportional with the income level. As a...

"We analyze the wage effects of employment breaks of women entering motherhood using a novel within-firm matching approach where mothers' wages upon return to the job are compared with those of their female colleagues within the same firm. Using an administrative German data set we investigate...

"Since the early 90's the West German firms have to deal with sharp changes of economic environment: the German Unification, the emerging competitors in the east European countries and the deregulation of several labour market institutions. We analyse the wage structure, the wage changes and the...

"Often the high level of unemployment in Germany is explained by a lack of flexibility, over-regulation in the labour market and disincentives of the social security system. However, these institutional effects are difficult to test by means of data from only one country. Cross-country...

"Mit der Einführung der Grundsicherung für Arbeitsuchende hat der Bund die Finanzierung der Leistungen zur Eingliederung in Arbeit für die Leistungsempfänger nach dem SGB II übernommen. Die Verteilung der Haushaltsmittel auf die 439 Leistungsträger in Arbeitsgemeinschaften und optierenden...

"Unemployment insurance (UI) sanctions in the form of benefit reductions are intended to set disincentives for UI recipients to stay unemployed. Empirical evidence about the effects of UI sanctions in Germany is sparse. Using administrative data we investigate the effects of sanctions on the...

"In this paper, we remove one serious drawback of the IAB employment sample impeding its applicability to the estimation of earnings frontiers: the censoring of the income data, by multiple imputation. Then, we estimate individual potential income with stochastic earnings frontiers, and we...

"In many countries fairly large and persistent regional disparities can be observed for a variety of economic indicators. Since these disparities can not be reduced to one single dimension, a classification system is needed to give a parsimonious overview. The article presents a system which is...

"This paper explores how different levels of regional concentration and specialisation affect the long-term growth of young firms. The sample consists of knowledge-intensive and non-knowledge-intensive western German manufacturing firms which were set-up in 1992 and managed to survive 11 years....

"In the last years the analysis of flow figures turned out to highly informative for labour market research and policy advice. Among researchers it is a well known fact that cross-sectional information about labour market is not sufficient to understand ungoing development. A pure sequence of...