The Research on the situation of people living in extreme poverty has been achieved as a result of two agreements signed in 2009 and 2012 between Istat, the Ministry of Labour and Social Policies, the Italian Federation of the organisms for homeless people ( fio.PSD) and the Italian Caritas, with the aim of establishing a comprehensive framework on the phenomenon of homeless people on Italian territory, on the status and profiles of homeless people and their main dynamics of land use, the service system formal and informal, public and private.
In the first survey three operating steps were necessary: i) a survey of organizations that provide services to the homeless on a sample of 158 Italian municipalities, selected based on population size, conducted by CATI; ii) an investigation on the services, conducted by CAPI; iii) a sample survey on homeless people in the canteen and night shelters surveyed in the previous phases.
The second survey had the aim of monitoring the phenomenon of serious adult marginalization in Italy to 36 months from the performance of the first.
The basic steps are: i) the updating of the canteen and night shelters surveyed in the previous investigation, conducted with CATI; ii) the sample survey on homeless people in the canteen and night shelters; iii) a feasibility study related to conducting a survey of homeless people who use the services of the street units.
Eurostat type of process classification
Social sample survey
Both the first and the second sample survey on homeless people were conducted for a period of thirty days ( 21novembre - 20 December ) in order to capture a large number of users of the canteen and night shelter services .
The investigations are part of a methodological approach that has its basis in indirect sampling as there is , a priori , the list of target population . The sampling frame , represented by the benefits provided by the services , is indirectly linked to the reference population ( homeless people ) . In this context, the following estimation approach is the " weight share method" based on the links ( links ) that unite the population of homeless people to that of the services provided .