Does a high regional concentration of immigrants of the same ethnicity affect immigrant children's acquisition of host-country language skills and educational attainment? We exploit the exogenous placement of guest workers from five ethnicities across German regions during the 1960s and 1970s in...

We analyze guest-workers' expected duration of stay in Germany within an econometric model taking into account the important distinction between permanent and temporary stayers, where the expected duration of stay for the latter is differentiated in short-term, medium-term and long-term stayers....