The standard approaches for dealing with provisional estimates essentially focus on the study and the definition of efficient estimator, exploiting the auxiliary information almost exclusively in the estimation phase. In this paper, we propose an extended appliance of the auxiliary information,...

When the imputed values are treated as if they were observed the precision of the estimates is generally overstated. In the paper three variance methods under imputatation are taken into account. Two of them are the well known bootstrap and Multiple Imputation. The third is a new method based on...

The Italian National Institute of Statistics carried out the first survey on homeless population. The survey aims at estimating the unknown size and some demographic and social characteristics of this population. The methodological strategy used to investigate homeless population could not...