We discuss the issues and the related study methodologies raised by the data linkage among different Istat archives to provide information on the employ- ment status of Italian graduates. To this aim many different administrative archives are integrated with data from sample surveys on university graduates’ vocational integration. From this integration, a very complex situation emerges which must be analysed and correctly interpreted. In this paper in order to show the feasibility of our method, we discuss the comparison among these sources and we present the strategy of constructing appropriate indicators.