"Theories in regional science predict that related establishments benefit from their mutual proximity due to forward-backward linkages, labor market pooling and knowledge spillovers (the Marshallian forces). While the existence of these externalities as a whole is well supported by the empirical...

"The paper analyses the impact of regional own-ethnic concentration on the language proficiency of immigrants. It solves the endogeneity of immigrants' location choices by exploiting the fact that guest-workers in Germany after WWII were initially placed by firms and labor agencies. We find a...

"The advent of the New Economic Geography has spawned a renewed interest in questions of agglomeration. The work expands the research on the impact of agglomeration economies on employment growth by connecting two strands of the empirical literature. A localization index and a cluster index are...

"This paper analyses extensively the effects of inter-regional mobility on the earnings of skilled workers. We interact returns to inter-regional migration with employer changes to separate the two effects and find that inter-regional mobility results in positive additional returns as compared...

"Of the typically cited agglomeration advantages labor market pooling receives strong empirical support - yet remains under-explored theoretically. This paper presents a model of human capital formation in an imperfectly competitive, pooled local labor market with heterogeneous workers and...

"Die Analyse untersucht die Beschäftigungseffekte von Vermittlungsgutscheinen und Personal-Service-Agenturen mit Hilfe einer makroökonometrischen Evaluation. Neben einer mikroökonometrischen Evaluation, welche die Wirkungen auf individueller Ebene untersucht, kann eine makroökonometrische...

"The advent of the New Economic Geography has spawned a renewed interest in questions of agglomeration. The work expands the research on the impact of agglomeration economies on employment growth by connecting two strands of the empirical literature. A localization index and a cluster index are...

"The paper analyses the impact of regional own-ethnic concentration on the language proficiency of immigrants. It solves the endogeneity of immigrants' location choices by exploiting the fact that guest-workers in Germany after WWII were initially placed by firms and labor agencies. We find a...