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For any question on data and metadata, please contact: Eurostat user support |
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1.1. Contact organisation | National Statistical Institute of Bulgaria |
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1.2. Contact organisation unit | Demographic and Social Statistics Directorate |
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1.5. Contact mail address | National Statistical Institute 2, P.Volov Str. 1038 Sofia, Bulgaria |
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2.1. Metadata last certified | 31/03/2014 | ||
2.2. Metadata last posted | 31/03/2014 | ||
2.3. Metadata last update | 31/03/2014 |
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3.1. Data description | |||
Restricted from publication | |||
3.2. Classification system | |||
ISCO-08, NACE Rev. 2, etc. |
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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 the biological and physiological characteristics that define men and women 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). According to the Family Code, Article 6, persons aged 18 years of age are allowed to enter into a marriage. Exception is provided for persons who have 16 years of age completed to enter into a marriage due to important circumstances based on court decision. There is no specialised legislation concerning opposite-sex and same-sex marriages. 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, 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. Private households are defined according to the 'housekeeping concept'. Current activity status' is the current relationship of a person to economic activity, based on the last seven days prior to enumeration. 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 or, if not available, to the income received. 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. The 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 successfully completed in the educational system of the country where the education was received. All education which is relevant to the completion of a level is taken into account even if this was provided outside schools and universities. A locality is defined as a distinct population cluster, that is an area defined by population living in neighbouring or contiguous buildings. Such buildings may either: Place of birth is defined as the place of usual residence of the mother at the time of the birth, or, if not available, as the place in which the birth took place. Citizenship is defined as the particular legal bond between an individual and his/her State, acquired by birth or naturalisation, whether by declaration, option, marriage or other means according to the national legislation. The 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. 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. 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. 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, 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 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, 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. Private households are defined according to the 'housekeeping concept'. Private 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 dwellings' are structurally separate and independent premises at fixed locations which are designed for permanent human habitation and are, at the reference date, either used as a residence, or vacant, or reserved for seasonal or secondary use. '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. The topic 'Type of ownership' refers to the ownership of the dwelling and not to that of the land on which the dwelling stands. The 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; or the total floor space of rooms falling under the concept of 'room'. 3.4.29. Statistical concepts and definitions - Number of roomsA '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’ relates the number of rooms per number of occupants, as specified under the topic 'Number of occupants'. The topic ‘Density standard’ relates to the number of rooms per number of occupants, as specified under the topic 'Number of occupants'. Water supply is a system for collection, transmission, treatment and distribution of water in the housing units usually by system of pipes and pumps. 3.4.33. Statistical concepts and definitions - Toilet facilitiesToilet facilities are an installation for disposal of human excreta. A flush toilet is an installation provided with piped water that permits humans to discharge their wastes and from which the wastes are flushed by water. 3.4.34. Statistical concepts and definitions - Bathing facilitiesA bathing facility is any facility designed to wash the whole body and includes shower facilities. 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 in the reporting country at the census reference date (see item 5) |
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3.9. Base period | |||
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Counts of statistical units |
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01/02/2011 |
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6.1. Institutional Mandate - legal acts and other agreements | |||
Law on Statistics Law on 2011 Population and Housing Census in the Republic of Bulgaria Regulation (EC) № 763/2008 of the European parliament and of the Council of 9 July 2008 on population and housing censuses Commission Regulation (EC) No 1201/2009 of 30 November 2009 implementing Regulation (EC) No 763/2008 of the European Parliament and of the Council on population and housing censuses as regards the technical specifications of the topics and of their breakdowns Commission Regulation (EU) No 519/2010 of 16 June 2010 adopting the programme of the statistical data and of the metadata for population and housing censuses provided for by Regulation (EC) No 763/2008 of the European Parliament and of the Council Commission Regulation (EU) No 1151/2010 of 8 December 2010 implementing Regulation (EC) No 763/2008 of the European Parliament and of the Council on population and housing censuses, as regards the modalities and structure of the quality reports and the technical format for data transmission Conference of european statisticians recommendations for the 2010 censuses of population and housing |
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6.1.1. Bodies responsible | |||
National Statistical Institute Central Census Commission District Census Commissions Municipal Census Commissions |
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6.2. Institutional Mandate - data sharing | |||
Restricted from publication |
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7.1. Confidentiality - policy | |||
Law on Statistics: Article 25. individual data received and collected through statistical surveys shall constitute a statistical secret and may be used only for statistical purposes. Individual data received for the purposes of statistical surveys may not be used as evidence before the bodies of the executive and the judiciary. (2) (Supplemented, SG No. 98/2008) The National Statistical Institute and statistical authorities and their staff may not disclose or provide: 1. individual statistical data; 2. (Amended, SG No. 98/2008) statistical data which can be matched in a way that enables the identification of a specific statistical unit; 3. (Amended, SG No. 98/2008) statistical information which aggregates data about less than three statistical units or about a population in which the relative share of the value of a surveyed parameter of a single unit exceeds 85 per cent of the total value of such parameter for all units in the population. Law on 2011 Population and Housing Census in the Republic of Bulgaria: Article 29. Statistical information received through the census is used for statistical purposes only. |
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7.2. Confidentiality - data treatment | |||
Census data confidentiality is guaranteed by application of SDC method "Cell suppression" prior to the data release or provision to users. The method is applied at two stages - primary suppression of cells containing up to 3 statistical units and secondary suppression of additional cells to prevent identification of sensitive cells through calculation. |
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8.1. Release calendar | |||
Data are made available 27 months after the end of the reference period (March 2014) |
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8.2. Release calendar access | |||
8.3. Release policy - user access | |||
2011 census data are provided to users free according to the List of Standard Statistical Indicators from 2011 Population and Housing Census, available at the NSI web site. Data on basic census topics as well as all census publications are available at the NSI web site. |
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Data on population and housing censuses are disseminated every decade |
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10.1. Dissemination format - News release | |||
http://www.nsi.bg/census2011/novinien.php Annexes: Main results of the Census 2011 |
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10.2. Dissemination format - Publications | |||
Publications are separated in four volumes: “Population”, “Building and dwelling fund”, “Districts and municipalities”, “Sample surveys”. Each volume contains data on the basic census results – population number, demographic and social characteristics, economic characteristics, migration, buildings, dwellings, and living conditions. Reference book “2011 Census”, containing data by statistical regions. 28 reference books with data by municipalities for each district. |
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10.3. Dissemination format - online database | |||
not applicable |
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10.4. Dissemination format - microdata access | |||
not applicable |
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10.5. Dissemination format - other | |||
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11.1. Documentation on methodology | |||
All normative and methodological census documentation can be found at the NSI web site: |
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11.2. Quality management - documentation | |||
The Quality management-documentation can be found at the NSI web site: http://www.nsi.bg/census2011/index.php |
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12.1. Quality assurance | |||
Quality of data is assured through validation, editing, coding and verifying of the coverage with administrative sources. All the procedures are performed following the clearly prescribed rules. |
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12.2. Quality management - assessment | |||
12.2.1. Coverage assessment | |||
The coverage assessment was done during the census micro data processing and validation. The coverage problems of the data received through the census questionnaires were solved by records deletion and imputation. Imputation of records is donethrough linking the micro data records with records from administrative sources. The procedure is done after a preliminary analysis of the registers used in respect their coverage and structure, the records uniqueness and classifications used. All records identified as missing were added to the 2011 Census micro database following predefined criteria and according to the variables required and population categories used. Deletion of records was done by checking for the records uniqueness based on person’s identification. |
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12.2.2. Post-enumeration survey(s) | |||
Not applicable |
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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 | |||
Date of data transmission 31.03.2014 |
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15.2. Punctuality | |||
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16.1. Comparability - geographical | |||
No deviations exist in respect definitions, units and classifications used. Data on all the topics are regionally compliant. |
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16.2. Comparability - over time | |||
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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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One of the methods for data collection used during 2011 census was e-census. It was extremely convenient for the respondents. The high share of persons counted via Internet facilitated the interviewers job and reduced the resources spent on field work. |
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19.1. Data revision - policy | |||
19.2. Data revision - practice | |||
In accordance to the Rules for Dissemination of Statistical Products and Services |
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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 | |||
Conventional Census |
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20.1.1.2. List of data sources - data on households | |||
Conventional Census |
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20.1.1.3. List of data sources - data on family nuclei | |||
Conventional Census |
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20.1.1.4. List of data sources - data on conventional dwellings | |||
Conventional Census |
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20.1.1.5. List of data sources - data on living quarters | |||
Conventional 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 are collected every decade, in a reference year that falls during the beginning of every decade |
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20.3. Data collection | |||
Data on persons, households, families and housing were collected by census questionnaires. The questionnaires used during the census were elaborated following the requirements of the European and Bulgarian legislation in respect obligatory topics, breakdowns and definitions. Two data collection methods were used: traditional census and e-census. Identical questionnaires were used for both data collection methods. Census tools and data collection methods were tested in September 2010 during a pilot census. The census lists were prepared based on the previous census lists updated based on administrative sources and regular statistical surveys. The country territory was divided to 13 000 census control regions and 41 000 census units under the condition that each census unit should cover up to 80 dwellings and up to 250 persons. |
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20.4. Data validation | |||
Data validation is done at two stages following predefined, clear and strict rules: |
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20.5. Data compilation | |||
Data processing was carried out by a designed for the purpose information system and on-line applications. Data entry: Data from the traditional census questionnaires were entered by operators and from the e-census - by persons themselves. There were clear and strict rules for the data entry: uniqueness of registration; uniqueness of the census units; existence of possible values for each topic and its elements; compliance checks in the address part; logic and intra-compliance checks between the separate topics into the different questionnaire parts. Data coding: Coding of the census questionnaires was done using predefined by name and code nomenclatures. Input fields of the type „Check box” were used for the short nomenclatures and „Autocomplete” - for the hierarchical ones. Data editing: The initial data editing was done during the data entry of printed questionnaires/on-line questionnaires. The following rules were applied: non-admission of values outside the defined; non-admission of inconsistent data. Estimation: Procedures for records deletion and addition and applied to solve the data coverage problems. Records addition was done by linking the micro database records with records from administrative sources. The procedure was performed after a preliminary analysis of the registers used in respect their coverage and structure, uniqueness of the records and the classifications used. The records identified as missing are added to the 2011 Census micro database following predefined criteria and according to the variables defined and census population categories. Records deletion was done after check for the records uniqueness based on persons identification. Generating of families and households: Households and families were created based on declaration. First, the head of the household was defined and next, the relation to the head for each household member. Persons were ordered by families (if such exist) within the household and the family members of the head of the household were first to be recorded. |
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20.6. Adjustment | |||
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