We present a model in which workers have to be educated to get employed and firms have to innovate in order to increase productivity. Education as well as innovation and production require skilled labour as inputs. This and the fact that learning opportunities differ across workers determine...

One of the most controversial aspects of immigration policy is the impact of foreigners on labour market outcomes of natives. Simple labour supply analysis demonstrates that these effects depend upon whether immigrants and natives act as substitutes or complements. In the first part of the study...