Resumen
In the last two decades it has growing the scientific interest in the socio-economic impacts of immigration on labour conditions of native workers. The studies show that these impacts are generally very weak and they are relatively concentrated in certain economic sectors. In the Spanish case, the studies concur with this assessment but found some differences when analyzing the increase occurred in the last ten years, due in part to the sectorial composition and the different initial share of immigrant workers. With this framework, the main aim of this paper is to analyze the impact of immigration on the employment in Castilla-La Mancha. Specifically, we study the general features of the incorporation of immigrant workers, their sectorial concentration and if there is a "replacement" effect over the native workers.