Il lavoro propone una raccolta organica di dati statistici relativi agli spostamenti internazionali di viaggiatori da e verso stati europei e, in particolare, stati aderenti all'Unione Europea. Sulla base della sistematizzazione concettuale delle informazioni attualmente disponibili da varie...

In the complex frame of the EU agriculture politics, a particular relevant aspect is given by the new regulation on durum wheat production and diffusion incentives. These subsidies are assigned according to a particular indicator (Quality Global Index - QGI), built up through a weighted mean of...

In this context, supposing a sampling survey framework and a model-based approach, the attention has been focused on the main features of the optimal prediction strategy for a population mean, which implies knowledge of some model parameters and functions, normally unknown. In particular, a...

This work remarks the need to carefully evaluate the real importance of each variable used in a multivariate analysis context, with particular regard to cases when an overall performance ranking is the main final purpose. In particular, both a preliminary transformation of variables – aimed at...

In the frame of a statistical survey, the identification of non respondent units that should be object with priority of a reminder action (Intensive Follow Up - IFU), with the aim to produce enough good estimates, represents a relevant, but quite not deeply analysed methodological aspect. In...

The Hulliger’s robust estimation technique consists in the re-weighting of units identified as outliers through a Robustified Ratio Estimator (RRE), according to which outliers Improving robust ratio estimation in longitudinal surveys with outlier observations 17 contribute to the final...

Il turismo è un fenomeno fortemente localizzato. Le caratteristiche del territorio ne denotano strutturalmente il profilo e i molteplici modelli di offerta cercano di soddisfare la variabilità dei gusti e delle esigenze dei visitatori. Sulla base della rilevazione ISTAT sul movimento nelle...