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For any question on data and metadata, please contact: Eurostat user support |
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1.1. Contact organisation | Croatian Bureau of Statistics |
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1.2. Contact organisation unit | Social Statistics Sector - Population Statistics |
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1.5. Contact mail address | Branimirova 19 10000 Zagreb Croatia |
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2.1. Metadata last certified | 02/04/2014 | ||
2.2. Metadata last posted | 02/04/2014 | ||
2.3. Metadata last update | 02/04/2014 |
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3.1. Data description | |||
The Croatian 2011 Census was carried out by means of the traditional method using paper-assisted personal interviews (PAPIs). The census day was 31 March 2011 and the enumeration period 1 – 28 April 2011.The Post-enumeration survey was carried out in the period 2-10 May 2011 on the sample of approximately 1.4% of households in the Republic of Croatia. There were 3 enumeration units: persons, households and dwellings. The number of enumerators was 13943 and the number of controllers (supervisers of enumerators) was 1950. The basic questionnaires were the 'Personal Questionnaire' and the 'Household and Dwelling Questionnaire'. The legal framework for the conduction of the 2011 Population Census in Croatia was the Act on the Census of Population, Households and Dwellings in the Republic of Croatia in 2011. The Act was adopted by the Croatian Parliament in July 2010, and is harmonized with the Regulation (EC) No 763/2008. The State Geodetic Administration was in charge for the updating and preparing the lists of spatial units and descriptive cartographic materials. The optical character recognition (OCR) was used in the data processing. The preliminary 2011 Census results were published on 29 June 2011 (the total number of population, households and dwellings). The first part of the final results were published in December 2012 and the rest of them in 2013 and 2014. The total census budget was approximately 21 million euros. The final census costs is considerably less – approximately 15.5 million euros. |
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3.2. Classification system | |||
ISCO-08, NACE Rev. 2, ISCED-97 |
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3.3. Coverage - sector | |||
3.4. Statistical concepts and definitions | |||
3.4.1. Statistical concepts and definitions - Usual residence Usual residence means the place where a person normally spends the daily period of rest, regardless of temporary absences for purposes of recreation, holidays, visits to friends and relatives, business, medical treatment or religious pilgrimage. Sex refers to a person’s biological status and is categorized as male and female. 3.4.3. Statistical concepts and definitions - AgeThe age reached at the reference date (in completed years). 3.4.4. Statistical concepts and definitions - Marital statusMarital status is the (legal) conjugal status of an individual in relation to the marriage laws of the country (de jure status). Never married persons are children under the age of 16 and all other persons who never got married in concordance with valid regulations. Married persons are those who got married before a competent body in concordance with valid regulations. Widowed persons are persons whose marriage ceased to exist by death of one of spouses or by declaring a missing spouse dead respectfully. Divorced persons are those whose marriage was terminated by a valid court decision. 3.4.5. Statistical concepts and definitions - Family statusThe family nucleus is defined in the narrow sense, that is as two or more persons who belong to the same household and who are related as husband and wife or as partners in a consensual union, or as parent and child. Thus a family comprises a couple without children, or a couple with one or more children, or a lone parent with one or more children. This family concept limits relationships between children and adults to direct (first-degree) relationships, that is between parents and children. The term couple refers to opposite-sex couple: married couples and couples who live in a consensual union. Data on 'Skip-generation households' were not collected in the 2011 Census in Croatia. 3.4.6. Statistical concepts and definitions - Household statusPrivate households are defined according to the 'housekeeping concept'. Current activity status' is the current relationship of a person to economic activity, based on a reference period of one week before census. The category 'Currently not economically active' includes persons under the age of 15 as well as those aged 15 and over who are neither employed nor unemployed. 3.4.8. Statistical concepts and definitions - Occupation'Occupation' refers to the type of work done in a job (that is the main tasks and duties of the work). Persons doing more than one job are allocated an occupation based on their main job, which is identified according to the time spent on the job. 'Industry' (branch of economic activity) is the kind of production or activity of the establishment (or similar unit) in which the job of a currently economically active person is located. An 'employee' is a person who works in a 'paid employment' job, that is a job where the explicit or implicit contract of employment gives the incumbent a basic remuneration, which is independent of the revenue of the unit for which he/she works. A category 'member of a producers' cooperative' is not applicable. 3.4.11. Statistical concepts and definitions - Place of workThe location of the place of work is the geographical area in which a currently employed person does his/her job. 'Educational attainment' refers to the highest level of successfully completed education. There was no discrimination between the education completed in regular school or a substitute of one (e.g. schools specialising in adult education), providing that the school is acknowledged in the official education system of the Republic of Croatia. Various courses organised at community colleges, agencies etc. that are not part of the education system of the Republic of Croatia were not taken into consideration, whereas a respondent provided the answer on the previously completed level of education in a school included in the formal education system. Persons aged 15 years or over are classified under only one of the categories according to their educational attainment (highest completed level). Persons under the age of 15 years are classified under 'not applicable'. 3.4.13. Statistical concepts and definitions - Size of the localityProposed definition of 'locality' is not aplicable in statistical system in Croatia, so instead category "settlement' is used. Settlement is a territorial anthropological and geographical unit which consists of areas intended for construction and those intended for other purposes, which has its own name and a system of numbering buildings within a settlement or a street system belonging to a settlement. 3.4.14. Statistical concepts and definitions - Place of birthPlace of birth is defined as the place of usual residence of the mother at the time of the birth. 'EU Member State' means a country that is a member of the European Union on 1 January 2011. The list of countries in the breakdown 'country/place of birth' serves only for statistical purposes. Citizenship is defined as the particular legal bond between an individual and his/her State, acquired according to the national legislation. A person with two citizenships (Croatian and other) is allocated to the Croatian citizenship. 'EU Member State' means a country that is a member of the European Union at the time of census. The list of countries in the breakdown 'Country of citizenship' shall only apply for statistical purposes. 'Other European country-Other' covers answers Kosovo and Gibraltar. 'Not stated' covers non-existing country of citizenship at the time of census, unknown foreign citizenship, as well as unknown citizenship at all. 3.4.16. Statistical concepts and definitions - Year of arrival in the countryThe year of arrival is the calendar year in which a person most recently established usual residence in the country. The data for 2011 refer to the time span between 1 January 2011 and the reference date (31 March 2011). 3.4.17. Statistical concepts and definitions - Residence one year beforeThis indicates the relationship between the current place of usual residence and the place of usual residence one year prior to the census (on 31 March 2010). Children under one year of age are classified under 'Not applicable'. The topic 'Housing arrangements' covers the whole population and refers to the type of housing in which a person usually resides at the time of the census. This covers all persons who are usual residents in different types of living quarters, or who do not have a usual residence and stay temporarily in some type of living quarters, or who are roofless, sleeping rough or in emergency shelters, when the census is taken. 'Occupied conventional dwellings' are conventional dwellings which are the usual residence of one or more persons at the time of the census. 'Other housing units' are rooms and facilities that are not dwellings in the construction sense, but were used as dwellings at the time of the Census. These can be rooms in buildings, e.g. an inhabited basement, storage room, garage, occupied business premises (warehouse facilities, offices, hotel or hospital rooms), as well as certain mobile or immobile objects, e.g. a railway car, truck, ship, tent, trailer, hovel etc. 'Collective living quarters' are a group of rooms used for organised habitation by large groups of people or several households.For instance, these include retirement homes, homes for children and youth, institutions for permanent care and accommodation of the physically and mentally disabled and persons with other illnesses, convents, prisons, military institutions etc. The family nucleus is defined in the narrow sense, that is as two or more persons who belong to the same household and who are related as husband and wife or as partners in a consensual union, or as parent and child. Thus a family comprises a couple without children, or a couple with one or more children, or a lone parent with one or more children. This family concept limits relationships between children and adults to direct (first-degree) relationships, that is between parents and children. The term couple refers to opposite-sex couple: married couples and couples who live in a consensual union. Data on 'Skip-generation households' were not collected in the 2011 Census in Croatia. 3.4.20. Statistical concepts and definitions - Size of family nucleusThe family nucleus is defined in the narrow sense, that is as two or more persons who belong to the same household and who are related as husband and wife or as partners in a consensual union, or as parent and child. Thus a family comprises a couple without children, or a couple with one or more children, or a lone parent with one or more children. This family concept limits relationships between children and adults to direct (first-degree) relationships, that is between parents and children. The term couple refers to opposite-sex couple: married couples and couples who live in a consensual union. Data on 'Skip-generation households' were not collected in the 2011 Census in Croatia. 3.4.21. Statistical concepts and definitions - Type of private householdThe family nucleus is defined in the narrow sense, that is as two or more persons who belong to the same household and who are related as husband and wife or as partners in a consensual union, or as parent and child. Thus a family comprises a couple without children, or a couple with one or more children, or a lone parent with one or more children. This family concept limits relationships between children and adults to direct (first-degree) relationships, that is between parents and children. The term couple refers to opposite-sex couple: married couples and couples who live in a consensual union. Data on 'Skip-generation households' were not collected in the 2011 Census in Croatia. 3.4.22. Statistical concepts and definitions - Size of private householdPrivate households are defined according to the 'housekeeping concept'. The topic 'Tenure status of households' refers to the arrangements under which a private household occupies all or part of a housing unit. 'Conventional dwelling' is every structurally connected unit intended for housing purposes, consisting of one or more rooms, with or without auxiliary rooms (kitchen, pantry, hallway, bathroom, toilet, etc.) and having a separate entrance directly from the hallway, stairway, yard or street. 'Occupied conventional dwellings' are conventional dwellings which are the usual residence of one or more persons at the time of the census. 'Other housing units' are rooms and facilities that are not dwellings in the construction sense, but were used as dwellings at the time of the Census. These can be rooms in buildings, e.g. an inhabited basement, storage room, garage, occupied business premises (warehouse facilities, offices, hotel or hospital rooms), as well as certain mobile or immobile objects, e.g. a railway car, truck, ship, tent, trailer, hovel etc. 'Collective living quarters' are a group of rooms used for organised habitation by large groups of people or several households.For instance, these include retirement homes, homes for children and youth, institutions for permanent care and accommodation of the physically and mentally disabled and persons with other illnesses, convents, prisons, military institutions etc. 'Occupied conventional dwellings' are conventional dwellings which are the usual residence of one or more persons at the time of the census. 'Unoccupied conventional dwellings' are conventional dwellings which are not the usual residence of any person at the time of the census. 'Dwellings reserved for seasonal or secondary use' covers dwellings used during seasonal agricultural activities, dwellings used for vacation and recreation (holiday/weekend houses or apartments), dwellings for business activity only, dwellings for tourist renting (only houses or apartments privately owned by citizens). 'Vacant dwellings' covers temporarily unoccupied dwellings and abandoned dwellings. 3.4.26. Statistical concepts and definitions - Type of ownershipThe topic 'Type of ownership' refers to the ownership of the dwelling and not to that of the land on which the dwelling stands. Category 'Cooperative ownership' is not aplicable. 'Rented dwellings' are those where at least one occupant pays a rent for the occupation of the dwelling, and where no occupant owns parts or the whole of the dwelling. 3.4.27. Statistical concepts and definitions - Number of occupantsThe number of occupants of a housing unit is the number of people for whom the housing unit is the usual residence. 3.4.28. Statistical concepts and definitions - Useful floor spaceUseful floor space is defined as the floor space measured inside the outer walls excluding non-habitable cellars and attics and, in multi-dwelling buildings, all common spaces. A 'room' is defined as a space in a housing unit enclosed by walls reaching from the floor to the ceiling or roof, of a size large enough to hold a bed for an adult (4 square metres at least) and at least 2 metres high over the major area of the ceiling. 3.4.30. Statistical concepts and definitions - Density standard (floor space)The topic ‘Density standard (floor space)’ relates the useful floor space in square metres to the number of occupants, as specified under the topic 'Number of occupants'. 3.4.31. Statistical concepts and definitions - Density standard (number of rooms)The topic ‘Density standard’ (number of rooms) relates to the number of rooms to the number of occupants, as specified under the topic 'Number of occupants'. 3.4.32. Statistical concepts and definitions - Water supply systemA dwelling is considered to have water supply system if at least one room is equipped with proper installations, irrespective of whether they are connected to the community network or to certain households devices or facilities. 3.4.33. Statistical concepts and definitions - Toilet facilitiesA dwelling is considered to have a toilet if such a sanitary appliance is located at a separate room inside the dwelling or in the bathroom. 3.4.34. Statistical concepts and definitions - Bathing facilitiesA dwelling is considered to have a bathroom if there is a room equipped with a bathtub or shower, with a proper water supply and sewer system. 3.4.35. Statistical concepts and definitions - Type of heatingA housing unit is considered as centrally heated if heating is provided either from a community heating centre or from an installation built in the building or in the housing unit, established for heating purposes, without regard to the source of energy. 3.4.36. Statistical concepts and definitions - Type of buildingThe topic 'Dwellings by type of building' refers to the number of dwellings in the building in which the dwelling is placed. 3.4.37. Statistical concepts and definitions - Period of constructionThe topic 'Dwellings by period of construction' refers to the year when the building in which the dwelling is placed was completed. |
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3.5. Statistical unit | |||
The EU programme for the 2011 population and housing censuses include data on persons, private households, family nuclei, conventional dwellings and living quarters |
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3.6. Statistical population | |||
Persons enumerated in the 2011 census are those who were usually resident in the territory of the reporting country at the census reference date. Usual residence means the place where a person normally spends the daily period of rest, regardless of temporary absences for purposes of recreation, holidays, visits to friends and relatives, business, medical treatment or religious pilgrimage |
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3.7. Reference area | |||
Data are available at different levels of geographical detail: national, NUTS2, NUTS3 and local administrative units (LAU2) |
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3.8. Coverage - Time | |||
Data refer to the situation at the census reference date (31 March 2011). (see item 5) |
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3.9. Base period | |||
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Counts of statistical units |
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31/03/2011 |
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6.1. Institutional Mandate - legal acts and other agreements | |||
Not available. |
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6.1.1. Bodies responsible | |||
Croatian Bureau of Statistics |
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6.2. Institutional Mandate - data sharing | |||
Not available. |
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7.1. Confidentiality - policy | |||
Data confidentiality is regulated by: -the Act on the Census of Population, Households and Dwellings in the Republic of Croatia 2011 (Official Gazette, No. 92/10), -the Official Statistics Act (Official Gazette, Nos. 103/03, 75/09, 59/12), -the Act on Personal Data Protection (Official Gazette, No. 103/03), - Ordinance on Conditions and Terms of Using Confidential Data for Scientific Purposes (Official Gazette, No. 137/13) |
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7.2. Confidentiality - data treatment | |||
As regards data confidentiality on lower territorial levels (settlemets, statistical areas, enumeration areas) specific rules were determined considering population number, type of variable, frequences, etc. As regards Census Hub data, data of frequency lower than 4 (all NUTS levels) are considered confidential and therefore are not presented in the census hub. |
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8.1. Release calendar | |||
There is no special release calandar for 2011 Census. There is a unique CBS's Publishing Programme (yearly edition) with a list of statistical issues planned for particular year. 2011 Census (final) data are available on web since December 2012 (first part of census data) and then in 2013 second part become available for public and the rest of data will be available during 2014. Census data are also available in publications and upon users' request. |
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8.2. Release calendar access | |||
8.3. Release policy - user access | |||
Census data published on CBS's website are available free of charge. Special data requests (tailored made data) are chargable depending on time needed for data extraction. Simple requests for data are free of charge. The access to confidential data (microdata) for scientific purposes shall be granted only if a scientific and research institution meet all terms defined in the Ordinance on Conditions and Terms of Using Confidential Data for Scientific Purposes |
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Data on population and housing censuses are disseminated every decade |
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10.1. Dissemination format - News release | |||
News releases are produced before publishing new sets of data on web or new publication. |
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10.2. Dissemination format - Publications | |||
The set of 2011 Census publications comprises: 1) 2011 Census, First Results by Settlements, CBS, Zagreb 2011. 2) 2011 Census, Population by Sex and Age, CBS, Zagreb, 2013. 3) 2011 Census, Population by Citizenship, Ethnicity, Religion and Mother Tongue, CBS, Zagreb, 2013. 4) 2011 Census, Population by Education, CBS, Zagreb (to be published in 2014) 5) 2011 Census, Population by Migration Characteristics, CBS, Zagreb (to be published in 2014) 6) 2011 Census, Population by Economic Characteristics, CBS, Zagreb (to be published in 2014) 7) 2011 Census, Female Population, CBS, Zagreb (to be published in 2014) 8) 2011 Census, Population with Difficulties in Performing Activities of Daily Living, CBS, Zagreb (to be published in 2014) 9) 2011 Census, Households and Families, CBS, Zagreb (to be published in 2014) 10) 2011 Census, Housing Characteristics, CBS, Zagreb (to be published in 2014) 11) 2011 Census, Evaluation of coverage and quality of 2011 Census, CBS, Zagreb (to be published in 2014) |
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10.3. Dissemination format - online database | |||
Online are available only data sets in html and excel format (situation in April 2014). |
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10.4. Dissemination format - microdata access | |||
The access to confidential data (microdata) for scientific purposes shall be granted only if a scientific and research institution meet all terms defined in the Ordinance on Conditions and Terms of Using Confidential Data for Scientific Purposes. |
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10.5. Dissemination format - other | |||
Not available. |
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11.1. Documentation on methodology | |||
Methodology Instructions 'Census of population, households and dwellings 2011', CBS, Zagreb, 2010 |
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11.2. Quality management - documentation | |||
'Evaluation of coverage and quality of 2011 Census data' will be published during 2014. |
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12.1. Quality assurance | |||
1) "Implementation of Total Quality Management in Croatian Bureau of Statistics, CBS, Zagreb, 2014" 2) "Handbook for Calculation of Quality Indicators, CBS, Zagreb, 2014" |
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12.2. Quality management - assessment | |||
12.2.1. Coverage assessment | |||
The Croatian 2011 Census was carried out by means of the traditional method on the entire national territory (full coverage), in each of 27 676 enumeration areas. Each enumerator had to enumerate all census units in his/her enumeration area. Each of 13 943 enumerators had his/her superviser who daily checked the job done. |
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12.2.2. Post-enumeration survey(s) | |||
Post enumeration survey was carried out immediately after the census enumeration on approx. 1,4% of households in the Republic of Croatia. Report on PES will be published in publication "Evaluation of coverage and quality of 2011 Census data" during 2014. |
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13.1. Relevance - User Needs | |||
The census data disseminated by Eurostat are addressed to policy makers, researchers, media and the general public. |
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13.2. Relevance - User Satisfaction | |||
No user satisfaction surveys are carried out. User inquiries are handled by the Eurostat User Support service. |
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13.3. Completeness | |||
Depends on the availability of data transmitted by the National Statistical Institutes. |
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14.1. Accuracy - overall | |||
14.1.1. Accuracy overall - Usual residence There are no particular reasons for data unreliability for this topic 14.1.2. Accuracy overall - SexThere are no particular reasons for data unreliability for this topic 14.1.3. Accuracy overall - AgeThere are no particular reasons for data unreliability for this topic 14.1.4. Accuracy overall - Marital statusThere are no particular reasons for data unreliability for this topic 14.1.5. Accuracy overall - Family statusThere are no particular reasons for data unreliability for this topic 14.1.6. Accuracy overall - Household statusThere are no particular reasons for data unreliability for this topic 14.1.7. Accuracy overall - Current activity statusThere are no particular reasons for data unreliability for this topic 14.1.8. Accuracy overall - OccupationThere are no particular reasons for data unreliability for this topic 14.1.9. Accuracy overall - IndustryThere are no particular reasons for data unreliability for this topic 14.1.10. Accuracy overall - Status in employmentThere are no particular reasons for data unreliability for this topic 14.1.11. Accuracy overall - Place of workThere are no particular reasons for data unreliability for this topic 14.1.12. Accuracy overall - Educational attainmentThere are no particular reasons for data unreliability for this topic 14.1.13. Accuracy overall - Size of the localityThere are no particular reasons for data unreliability for this topic 14.1.14. Accuracy overall - Place of birthThere are no particular reasons for data unreliability for this topic 14.1.15. Accuracy overall - Country of citizenshipThere are no particular reasons for data unreliability for this topic 14.1.16. Accuracy overall - Year of arrival in the countryThere are no particular reasons for data unreliability for this topic 14.1.17. Accuracy overall - Residence one year beforeThere are no particular reasons for data unreliability for this topic 14.1.18. Accuracy overall - Housing arrangementsThere are no particular reasons for data unreliability for this topic 14.1.19. Accuracy overall - Type of family nucleusThere are no particular reasons for data unreliability for this topic 14.1.20. Accuracy overall - Size of family nucleusThere are no particular reasons for data unreliability for this topic 14.1.21. Accuracy overall - Type of private householdThere are no particular reasons for data unreliability for this topic 14.1.22. Accuracy overall - Size of private householdThere are no particular reasons for data unreliability for this topic 14.1.23. Accuracy overall - Tenure status of householdThere are no particular reasons for data unreliability for this topic 14.1.24. Accuracy overall - Type of living quarterThere are no particular reasons for data unreliability for this topic 14.1.25. Accuracy overall - Occupancy statusThere are no particular reasons for data unreliability for this topic 14.1.26. Accuracy overall - Type of ownershipThere are no particular reasons for data unreliability for this topic 14.1.27. Accuracy overall - Number of occupantsThere are no particular reasons for data unreliability for this topic 14.1.28. Accuracy overall - Useful floor spaceThere are no particular reasons for data unreliability for this topic 14.1.29. Accuracy overall - Number of roomsThere are no particular reasons for data unreliability for this topic 14.1.30. Accuracy overall - Density standard (floor space)There are no particular reasons for data unreliability for this topic 14.1.31. Accuracy overall - Density standard (number of rooms)There are no particular reasons for data unreliability for this topic 14.1.32. Accuracy overall - Water supply systemThere are no particular reasons for data unreliability for this topic 14.1.33. Accuracy overall - Toilet facilitiesThere are no particular reasons for data unreliability for this topic 14.1.34. Accuracy overall - Bathing facilitiesThere are no particular reasons for data unreliability for this topic 14.1.35. Overall accuracy - Type of heatingThere are no particular reasons for data unreliability for this topic 14.1.36. Overall accuracy - Type of buildingThere are no particular reasons for data unreliability for this topic 14.1.37. Overall accuracy - Period of constructionThere are no particular reasons for data unreliability for this topic |
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14.2. Sampling error | |||
14.3. Non-sampling error | |||
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15.1. Timeliness | |||
Starting from 19 May 2014, hypercubes will be successively transmitted to Eurostat. |
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15.2. Punctuality | |||
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16.1. Comparability - geographical | |||
Comparable. |
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16.2. Comparability - over time | |||
2011 Census data are not comparable with previous censuses in Croatia due to different definition of total population (usual residence in 2011). Also, different definition of economic activity in 2011 is used (current activity in reference week) in comparison with previous censuses when prevailing activity during previous year was used. |
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17.1. Coherence - cross domain | |||
Figures provided by the National Statistical Institutes in the framework of the 2011 Population and Housing Census may differ from those transmitted in other statistical domains due to the cross domain differences in definitions and methodologies used. For additional information please see metadata specific to each domain. |
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17.2. Coherence - internal | |||
Internal coherence is assured by regulations defining breakdowns and definitions of topics (Regulation (EC) No 1201/2009, Regulation (EU) No 519/2010, Regulation (EU) No 1151/2010) |
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The total census budget was approx. 21 million euros. The Census Budget was set by the Census Law and was covered in the budged for the years 2010, 2011 and 2012. The final census costs is considerably less – approximately 15.5 million euros. The 2011 Census did not place any particular burden to respondents. |
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19.1. Data revision - policy | |||
No revision of the 2011 census data is planned. |
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19.2. Data revision - practice | |||
No revision of the 2011 census data is planned. |
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20.1. Source data | |||
20.1.1. List of data sources | |||
20.1.1.1. List of data sources - data on persons | |||
2011 Census |
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20.1.1.2. List of data sources - data on households | |||
2011 Census |
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20.1.1.3. List of data sources - data on family nuclei | |||
2011 Census |
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20.1.1.4. List of data sources - data on conventional dwellings | |||
2011 Census |
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20.1.1.5. List of data sources - data on living quarters | |||
2011 Census |
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20.1.2. Classification of data sources | |||
20.1.2.1. Classification of data sources - data on persons | |||
01.Conventional censuses | |||
20.1.2.2. Classification of data sources - data on households | |||
01.Conventional censuses | |||
20.1.2.3. Classification of data sources - data on family nuclei | |||
01.Conventional censuses | |||
20.1.2.4. Classification of data sources - data on conventional dwellings | |||
01.Conventional censuses | |||
20.1.2.5. Classification of data sources - data on living quarters | |||
01.Conventional censuses | |||
20.2. Frequency of data collection | |||
Data on population and housing censuses in Croatia are collected every decade. |
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20.3. Data collection | |||
As a part of the preparatory work for the 2011 Census, the Census Test was carried out in 2009 in order to test methodological, organisational and IT solutions. 2011 Census was carried out by traditional method, i.e. face-to-face interviews using paper forms (Personal Questionnaire and Household and Dwelling Questionnaire). There were 3 enumeration units: population, households and dwellings. The Census was carried out in the period 1-28 April 2011 in accordance with the situation on 31 March 2011 at midnight. Post enumeration survey was carried out immediately after the Census, in the period 2-10 May 2011, on the sample of approx. 1.4% of households in the Republic of Croatia. Before enumeration started, general public had been informed through communication chanells. Also, CBS established Call Center and web page specifically designed for the Census. The web page included answers to frequently asked questions, census questionnaires as well as a list of enumeration centers. 2011 Census was prepared, organised and executed by the Croatian Bureau of Statistics. The State Geodetic Administration was responsible for preparing the list of spatial units and descriptive cartographic materials. For the purpose of preparation, organisation and execution of the 2011 Census in the field, the following bodies were set up hierarchicaly: county census committees, census committees in town/municipalities. Within the area of their competence, mentioned bodies set up census centers and nominated and/or apponited participants of 2011 Census (enumerators and controllers). Out in the field there were 13943 enumerators, 1950 controllers (enumerators' supervisors), 193 instructors, as well as 45 county coordinators. Additional participants include members of county census committees, census committees in towns/municipalities and members of census centers. After the enumeration on the field had finished, entire census material were transported and stored in one place, and afterwards data processing started. |
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20.4. Data validation | |||
Data validation started at the beginning of enumeration in sense that controllers (enumerators’ supervisors) daily checked questionnaires filled in by enumerator and made corrections in case of inconsistency or mistake. Also, random checks of census questionnaires were done in census centres during entire period of enumeration. Data validation continued through data processing system starting with manual checks (checking whether all addresses are comprised and checking identification numbers). After questionnaire scanning and coding, various checks followed. Many corrections were done automatically using automated editing. Also, there were around 20 types of on-line editing, performed by operators who used manuals (explaining how to correct mistakes) prepared by the CBS staff. All inconsistences were corrected on micro level. Final data validation refers to analysing numerous tables through cross-variables checks. Those tables were analysed by experienced CBS staff and, if necessary, inconsistences were corrected on micro-level. At the final stage, 2011 Census data were validated by: comparison with previous census data; comparison with LFS and other surveys; comparison with administrative sources. |
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20.5. Data compilation | |||
IFP (Intelligent Forms Processing) was used for document capture. We have used four Kodak scanners and captured all of the documents in both TIFF and PDf format. All of the captured data was imported into a SQL 2008R2 database, forming two main tables – data from personal questionnaires and data from Household and Dwelling Questionnaire. Both tables are linked by identifiers (town/municipality code, enumeration area code, dwelling code, household code, person ordinal within the household). The forms were then processed using in-house developed applications and commercial software. Most of the software was developed in-house, using Microsoft Visual Basic for .NET and SQL Server 2008R2, with the exception of software for data capture, coding and analysis. Parallel to the Census database, test database was used for testing both on-line editing and batch jobs. Separate database was used for data coding. ACTR software (Automated Coding by Text Recognition) developed by Statistics Canada was used for automated coding, accompanied with our own on-line application for computer aided coding, and based on the ACTR results. In that manner the following variables were coded: Settlement Street, town/municipality, foreign country, citizenship, ethnicity, mother tongue, religion, title of the highest completed school, vocation/field of education, occupation, and industry. Each operator could, while editing and correcting data, display the appropriate form and depending forms in PDF format. All of the operators' actions were recorded. Control tables were prepared in MS Excel. Methodologists were able to browse the data and prepare their own views using SAS Enterprise Guide Software. The deleted records were just marked as deleted, but physically remained in the database. Imputations rules were developed by demographic experts, and then tested using the test database. All of the changes were analysed before applying them to the actual data. The final results were published on our website in HTML and Excel format. Currently, we have prepared them for PC-Axis and they will be presented in .px form as well. The Census Hub has been established with the help of Eurostat experts, and we are currently in the process of preparing and publishing data using the Census Hub. It is also possible to search names and surnames on our website based on data collected in the 2011 Population Census, where one can find out how many persons have certain name, surname or full name combinations. |
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20.6. Adjustment | |||
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