Alicante, España
It can be observed in the research that the European Union Labour Force Survey (EU LFS) only allows a satisfactory estimation of the stocks of nonnationals or those born abroad in some countries, whereas it proves to be less than adequate in most of them with regard to migration flows. We believe that this very limited success is due to a twofold statistical problem of imprecision and bias, which is intensified by the embarrassing question of answer impossible. These difficulties exist among the Member States to a greater or lesser degree, depending on the characteristics of the migratory domain and the particular features that the EU LFS acquires in each country.