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Sample characteristics: Italy

Census/survey characteristics
Type Census
Title The 14th General Population Census and General Housing Census
Statistical agency National Institute of Statistics
Population universe All population who reside in Italy and all persons who do not live in Italy but are present at the time of the census
De jure or de facto De jure
Census/survey day 2001-10-21 00:00:00
Questionnaire A single booklet of Household Form with five sections: 1) List A: household members, 2) List B: individuals who do not usually reside in the accommodation, 3) Section I, information on the dwelling (for all persons in List A and List B), 4) Section II, information on the individuals who usually reside in the accomodation (persons on List A), and 5) Section III, information on individuals who do not usually reside in the dwelling (persons on List A). Section I to III are de-identified with names removed.
Type of fieldwork Self enumeration
Microdata sample characteristics
Sample design Systematic sample of every 20th dwelling.
Sample fraction 0.05
Sample size (person records) 2990739
Sample weights Self-weighting. Expansion factor = 20.
Units identified in microdata
Dwellings Yes
Vacant units No
Households Yes
Collective dwellings Yes
Smallest geography Region
Unit definitions
Dwellings Not specified
Households A group of people, bound by marriage, kinship, affinity, adoption, guardianship or emotional ties, who are partners and live in the same Municipality.
Collective dwellings Not specified
Census/survey characteristics
Type Census
Title 15th General Population and Housing Census
Statistical agency National Institute of Statistics
Population universe All citizens or foreigners registered to stay in Italy
De jure or de facto De jure
Census/survey day October 9, 2011
Questionnaire A single census form for dwellings and persons
Type of fieldwork Direct and self-enumeration
Microdata sample characteristics
Sample design 5% sample drawn by national statistics office
Sample fraction 0.05
Sample size (person records) 2968065
Sample weights Self-weighting (expansion factor=20)
Units identified in microdata
Dwellings No
Vacant units No
Households Yes
Collective dwellings Yes
Smallest geography Region
Unit definitions
Dwellings Dwelling refers to a room (or set of rooms) that is: regularly dedicated to residential use; separate (i.e. surrounded by walls and covered by a roof); independent (with at least one external access that is either independent or through shared entry areas - road, courtyard, stairs, landings, common balconies, terraces, etc. - access, in other words, does not require passing through other dwellings); incorporated in a building (or constitutes a building).
Households Group of persons who are cohabiting as usual residents of a dwelling
Collective dwellings Collective residential structure refers to facilities used to house large groups of people and/or one or more families. This category includes hotels, hospitals, rest homes for senior citizens and reception centers and institutes of various kinds (religious, healthcare-related, welfare support, educational, etc.).
Census/survey characteristics
Type Survey
Title Labour Force Survey
Statistical agency National Institute of Statistics (ISTAT)
Population universe All members of families residing in Italy, even if temporarily emigrated abroad, excluding permanent members of institutional quarters (hospices, religious institutes, barracks, etc.). Families composed only of inactive persons age 75 or older were not re-interviewed after the first interview.
De jure or de facto De jure
Census/survey day Continuous survey
Field work period Continuous survey on a quarterly basis. Information is collected with reference to all the weeks of each quarter, through a uniform distribution of the sample over these weeks. The survey is carried out during all weeks of the year. 
Questionnaire A single booklet with a general record of respondents and 12 sections: 1) Classification of individuals; 2) Labor status in the reference week (for people aged 15 or more); 3) Main job for employed people; 4) Second job for employed people; 5) Previous work experience (for unemployed people); 6) Search for employment (for people aged 15 or more); 7) Employment services and agencies (for people aged 15-74); 8) Education and training (for people aged 15 or more); 9) Self-perceived condition and Residency (for people aged 15 or more); 10) Information on the household (for the last family member interviewed); 11) Closing questions for the interviewer; 12) Pending coding
Type of fieldwork Direct enumeration (first interview) and Computer-assisted telephone interviewing (CATI)
Microdata sample characteristics
Sample design Two-stage sample with stratification of the first-stage units. The first-stage units are municipalities; second-stage units are families. Within each province municipalities are stratified according to population size. Municipalities larger than a predetermined population threshold are included in the sample; remaining municipalities are stratified by population size and extracted with probability proportional to the population size. The sample municipalities remain the same over time. In each quarterly survey, around 1,400 municipalities and 70,000 families are selected. The families included in the sample are interviewed 4 times within 15 months. Each family is interviewed for two consecutive quarters; an interruption follows for the next two quarters, after which the family is interviewed again for another two quarters. Microdata samples distributed by IPUMS are from Quarter 1 surveys.
Sample fraction varies
Sample size (person records) ~100,000
Sample weights Survey weights computed by statistical agency should be used for most types of analysis
Units identified in microdata
Dwellings No
Vacant units No
Households Yes
Collective dwellings No
Smallest geography 2011-2013: Region; 2014 and after: Province
Unit definitions
Households The family is understood as a de facto family, that is as a group of people linked by bonds of marriage, kinship, affinity, adoption, protection or by emotional bonds, cohabiting and having habitual residence in the same municipality; if the selected family cohabits with other families, only the extracted family is interviewed.