ANNEX I

Background information

The structure of the background information to the population and housing censuses conducted in the Member States for the reference year 2011 comprises the following sections:

1.   OVERVIEW

1.1.   Legal background

1.2.   Bodies responsible

1.3.   References to other relevant documentation (e.g. national quality reports) (optional)

2.   DATA SOURCES (1)

2.1.   Classification of the data sources according to Article 4(1) of Regulation (EC) No 763/2008

2.2.   List of the data sources used for the 2011 census (2)

2.3.   Matrix ‘Data sources x Topics’

2.4.   Extent to which the data sources meet the essential features (Article 4(4) of Regulation (EC) No 763/2008)

2.4.1.   Individual enumeration

2.4.2.   Simultaneity

2.4.3.   Universality within the defined territory

2.4.4.   Availability of small-area data

2.4.5.   Defined periodicity

3.   CENSUS LIFECYCLE

3.1.   Reference date according to Article 5(1) of Regulation (EC) No 763/2008

3.2.   Preparation and execution of data collection

3.2.1.   Questionnaire-based data

3.2.1.1.

Design and testing of questionnaires (including copies of all final questionnaires)

3.2.1.2.

Preparation of any address lists, preparation of the field work, mapping, publicity

3.2.1.3.

Data collection (including field work)

3.2.2.   Register-based data

3.2.2.1.

Creation of new registers from the year 2001 onwards (where applicable)

3.2.2.2.

Re-design of existing registers from the year 2001 onwards (including changes in the contents of registers, adaptation of the census population, adaptation of definitions and/or technical specifications) (where applicable)

3.2.2.3.

Maintenance of the registers (for each register used for the 2011 census), including — content of the register (registered statistical units and information on the statistical units, any record editing and/or item imputation in the register) — administrative responsibilities — legal obligation to register information, incentives for providing truthful information or possible reasons for providing false information — delays in reporting, in particular legal/official delays, data registration delays, late reporting — evaluation of and clearance for non-registration, non-deregistration, multiple registration — any major register revision that affects the 2011 census data, periodicity of register revisions — stability (comparability of information on the registered population over time) (optional) — usage, including ‘statistical usage of the register other than for the census’ and ‘usage of the register other than for statistical purposes (e.g. administrative purposes)’

3.2.2.4.

Matching of registers (including identifying variable(s) used for record linkage)

3.2.2.5.

Data extraction

3.3.   Processing and evaluation

3.3.1.   Data processing (including capturing, coding, identifying variable(s), record editing, record imputation, record deletion, estimation, record linkage including identifying variable(s) used for the record linkage, generation of households and families)

3.3.2.   Quality and coverage assessment, post-enumeration survey(s) (where applicable), final data validation

3.4.   Dissemination (dissemination channels, assurance of statistical confidentiality including statistical disclosure control)

3.5.   Measures to ensure cost effectiveness

---

(1)  The reporting for section 2 must be comprehensive and free of overlaps in the sense that it is possible to allocate each topic to exactly one data source.

(2)  For data sources that result from a record linkage, the list comprises information on the new data source and on all original data sources from which the new data source has been derived.

ANNEX II

Quality-related data and metadata

The quality-related data and metadata about the data sources and topics comprise the items listed below.

1.   RELEVANCE

1.1.   Adequacy of data sources

Member States have to report on the adequacy of the data sources, in particular on the impact of any major deviation from the essential features of population and housing censuses and/or from the required definitions and concepts where this seriously impairs the adequate usage of the transmitted data.

1.2.   Completeness

The following data have to be provided for

—	all geographical areas at the following levels: national level, NUTS 1, NUTS 2,

—

all hypercubes (1) and all primary marginal distributions (1): (1) number of all special cell values ‘not available’ (2) number of special cell values ‘not available’ flagged as ‘unreliable’ (3) number of special cell values ‘not available’ flagged as ‘confidential’ (4) number of numerical cell values flagged as ‘unreliable’

2.   ACCURACY

The following information:

—	has to be provided for each data source (section 2.1.) and each topic (section 2.2.), referring to person counts (2) and

—	may be provided for data sources (section 2.1.) and topics (section 2.2.), referring to counts of statistical units other than persons (optional)

2.1.   Data sources (3)

The data as required under point 2.1.1. have to be provided for all geographical areas at the following levels: national level, NUTS 1, NUTS 2. The explanatory metadata as required under point 2.1.2. have to be provided for the national level.

2.1.1.   Data

(1)

Census population: absolute value and percentage of the estimated target population;

(2)

Estimated target population (4): absolute value;

(3)

Under-coverage (estimated): absolute value and percentage of the census population;

(4)

Over-coverage (estimated): absolute value and percentage of the census population;

(5)

Number of all record imputations (5): absolute value and percentage of the census population;

(6)

Number of all record deletions (6): absolute value and percentage of the census population;

(7)

Additionally, for samples: complementary set of statistical units (7): absolute value;

(8)

Number of non-imputed records in the data source for statistical units belonging to the target population: absolute value (8), percentage of the census population (8), percentage of the estimated target population (9), and percentage of all non-imputed records in the data source (before any record deletion) (10);

(9)

additionally, for questionnaire-based data in the data source: (11) unit no-information (before record imputation): absolute value and percentage of the census population.

2.1.2.   Explanatory metadata

The explanatory metadata contain descriptions of

—	the operation to assess under-coverage and over-coverage, including information on the quality of the estimates for under- and over-coverage,

—	any method used to impute or delete records for statistical units,

—	any method applied to weigh data records for statistical units,

—	additionally for questionnaire-based data in the data source: (11) any measures to identify and limit unit no-information or other measures to correct errors during the collection of data.

2.2.   Topics

The data required under point 2.2.1. have to be provided for all geographical areas at the following levels: national level, NUTS 1, NUTS 2. The explanatory metadata required under point 2.2.2. has to be provided for the national level.

2.2.1.   Data

(1)

Census population (12): absolute value;

(2)

Number of data records (13) that contain information on the topic: non-weighted (14) absolute value, non-weighted (14) percentage of the census population;

(3)

Number of imputed data records (13), (15) that contain information on the topic: non-weighted (14) absolute value, non-weighted (14) percentage of the census population;

(4)

Item imputation (13) (15) for the topic: non-weighted (14) absolute value, non-weighted (14) percentage of the census population;

(5)

Item no-information (13) (before item-imputation) for the topic: non-weighted (14) absolute value, non-weighted (14) percentage of the census population;

(6)

Number of non-imputed observations on the topic: (13), (16) non-weighted (14) absolute value, non-weighted (14) percentage of the census population;

(7)

Transmitted data (17) for the hypercube set out in the table in Annex III for the topic in question (18): absolute value, percentage of the census population;

(8)

Number of non-imputed data records (13) that contain non-imputed information on the topic broken down according to the hypercube set out in the table in Annex III for the topic in question (18): non-weighted (14) absolute value, non-weighted (14) percentage of the census population;

(9)

Additionally, for topics about which information has been collected by means of a sample: coefficient of variation (19) for the cells in the hypercube set out in Annex III for the topic in question (18).

2.2.2.   Explanatory metadata

The explanatory metadata contain descriptions of the method used to treat item non-response for the topic in question.

For topics about which information has been collected by means of a sample, the metadata also contain descriptions of

—	the sampling design,

—	possible biases in the estimation due to model assumption errors,

—	formulae and algorithms used to calculate the standard error.

3.   TIMELINESS AND PUNCTUALITY

The following information has to be provided for the national level:

(1)	Calendar date(s) of the transmission of data to the Commission (Eurostat), broken down by hypercubes (1);

(2)	Calendar date(s) of major revision(s) of the transmitted data, broken down by hypercubes (1);

(3)	Calendar date(s) of transmission of the metadata (20).

In the case of major revisions on 1 April 2014 or after, Member States have to report the respective calendar date(s) separately to the Commission (Eurostat) within one week after each major revision.

4.   ACCESSIBILITY AND CLARITY (OPTIONAL)

Member States may report on the conditions for access to the data and metadata they make available from their 2011 censuses of population and housing, including on those relating to media, support, documentation, pricing policies, and/or any restrictions.

5.   COMPARABILITY

For each topic, Member States have to report on any definition or practice in the Member State which could impair the EU-wide comparability of the data.

6.   COHERENCE

For each topic referring to person counts (2), Member States have to provide the average absolute deviation (21) for the cell values in the hypercubes set out in Annex III (18).

---

(1)  As listed in Annex I to Regulation (EU) No 519/2010.

(2)  Topics, or data sources for topics, for which the total shown in the table in Annex III is the total population.

(3)  The reporting on the data sources must be comprehensive and free of overlaps in the sense that it is possible to allocate each topic to exactly one data source about which information is provided in this section. If a record linkage has led to the creation of a new data source, Member States have to evaluate the new data source rather than the original data sources from which the new data source has been derived.

(4)  ((1) + (3) – (4)), referring to the data in point 2.1.1. of this Annex, given in absolute values.

(5)  Any record imputation increases the size of the census population. In a data source resulting from a record linkage, only the records that have been imputed into any of the original data sources, thereby increasing the size of the census population, have to be counted as imputed records in the new data source.

If a data record is weighted in the process of generating the required statistical output for the target population with a weight worig bigger than 1, it has to be counted as an imputed record with the weight wimputed = worig – 1. The reference hypercube for the weights worig is the one listed below the table in Annex III for the statistical units on which the data source reports.

(6)  Any record deletion decreases the size of the census population. In a data source resulting from a record linkage, only the records that have been deleted in any of the original data sources, thereby decreasing the size of the census population, have to be counted as deleted records in the new data source.

If a data record is weighted in the process of generating the required statistical output for the target population with a weight worig smaller than 1, it has to be counted as a deleted record with wdeleted = 1 – worig. The reference hypercube for the weights worig is the one listed below the table in Annex III for the statistical units on which the data source reports.

(7)  If a data source comprises, as a matter of methodological principle, data records for only a sample of the statistical units in its estimated target population, the size of the complementary set of statistical units is calculated according to the sampling design.

(8)  ((1) – (4) – (5) – (7)), referring to the data in point 2.1.1. of this Annex, given in absolute values, respectively 100 * ((1) – (4) – (5) – (7)) / (1).

(9)  100 * ((1) – (4) – (5) – (7)) / ((1) + (3) – (4)), referring to the data in point 2.1.1. of this Annex.

(10)  100 * ((1) – (4) – (5) – (7)) / ((1) – (5) + (6) – (7)), referring to the data in point 2.1.1. of this Annex.

(11)  In a data source resulting from a record linkage of more than one questionnaire-based data sources, the information has to be provided for each original questionnaire-based data source.

(12)  As identified under point 2.1.1. (1) of this Annex for the data source from which census information on the topic is derived for the target population.

(13)  For the census population in the data source from which census information on the topic is derived.

(14)  If the data records are weighted in the process of generating the required statistical output for the topic in question, ‘weighted’ means that these weights are be applied to the data records for the count, ‘non-weighted’ means that these weights are not be applied to the data records for the count. The reference hypercubes for the weights are those listed for the topics in the table in Annex III.

(15)  An item imputation has no effect on the size of the census population. For a topic belonging to a data source resulting from a record linkage, any record that contains information on that topic as a result of a record imputation into any of the original data sources is counted as a record imputation if the imputation increases the size of the census population, and as an item imputation for that topic if the imputation does not increase the size of the census population.

(16)  ((2) – (3) – (4)), referring to the data in section 2.2.1. of this Annex.

(17)  The data transmitted on the basis of Regulation (EU) No 519/2010 in the hypercube listed for the respective topic in the table in Annex III.

(18)  The geographical area for which the information has to be provided is indicated in the table in Annex III.

(19)  Where a numerical cell value is smaller than 26, the coefficient of variation can be replaced by the special value ‘not available’.

(20)  As listed in Annex II to Regulation (EU) No 519/2010.

(21)  The arithmetic average of the absolute (positive) value of the difference between the numerical cell value and its arithmetic average, with the arithmetic averages being calculated for all hypercubes (as listed in Annex I to Regulation (EU) No 519/2010) in which the respective hypercube as set out in Annex III is contained.

ANNEX III

Cross-tabulations for the quality assessment

For the hypercubes set out below, the following data have to be provided:

—	all topics as required by Annex II, points 2.2.1. (7) and (8),

—	the topics about which information has been collected by means of a sample, as required by Annex II, point 2.2.1. (9), and

—	the coherence between the hypercubes (1) as required by Annex II, point 6.

Topic(s)	No. of reference hypercube (*1), (*2)	Cross-tabulations for the quality assessment
		Total	Breakdowns (*3)
Sex, Age	42	Total population	GEO.L. SEX. AGE.H.
Current activity status	18	Total population	GEO.L. SEX. AGE.M. CAS.L.
Location of place of work	22	Total population	LPW.L. SEX. AGE.M.
Locality	4	Total population	GEO.L. SEX. AGE.M. LOC.
Legal marital status	18	Total population	GEO.L. SEX. AGE.M. LMS.
Occupation	13	Total population	GEO.L. SEX. AGE.M. OCC.
Industry	14	Total population	GEO.L. SEX. AGE.M. IND.H.
Status in employment	12	Total population	GEO.L. SEX. AGE.M. SIE.
Educational attainment	14	Total population	GEO.L. SEX. AGE.M. EDU.
Country / place of birth	45 26	Total population	GEO.L. SEX. AGE.M. POB.M. GEO.N. SEX. AGE.M. POB.H.
Country of citizenship	45 27	Total population	GEO.L. SEX. AGE.M. COC.M. GEO.N. SEX. AGE.M. COC.H.
Year of arrival in the country	25	Total population	GEO.L. SEX. AGE.M. YAE.L.
Place of usual residence one year prior to the census	17	Total population	GEO.L. SEX. AGE.M. ROY.
Household status	1	Total population	GEO.L. SEX. AGE.M. HST.H.
Family status	6	Total population	GEO.L. SEX. AGE.M. FST.H.
Type of family nucleus, Size of family nucleus (optional)	52	Number of all families	GEO.L. TFN.H. SFN.H.
Type of private household, Size of private household (optional)	5	Number of all private households	GEO.L. TPH.H. SPH.H.
Tenure status of household (optional)	5	Number of all private households	GEO.L. TSH. SPH.H.
Housing arrangement	38	Total population	GEO.L. SEX. AGE.M. HAR.L.
Type of living quarters (optional)	59	Number of all living quarters	GEO.L. TLQ.
Occupancy status of conventional dwellings (optional)	53	Number of all conventional dwellings	GEO.L. OCS.
Type of ownership (optional)	41	Number of all occupied conventional dwellings	GEO.L. OWS.
Number of occupants, Useful floor space and/or number of rooms of housing unit (optional)	41	Number of all occupied conventional dwellings	GEO.L. NOC.H. (UFS. or NOR.)
Number of occupants, Density standard (optional)	41	Number of all occupied conventional dwellings	GEO.L. NOC.H. (DFS. or DRM.)
Water supply system (optional)	41	Number of all occupied conventional dwellings	GEO.L. WSS.
Toilet facilities (optional)	41	Number of all occupied conventional dwellings	GEO.L. TOI.
Bathing facilities (optional)	41	Number of all occupied conventional dwellings	GEO.L. BAT.
Type of heating (optional)	41	Number of all occupied conventional dwellings	GEO.L. TOH.
Dwellings by type of building (optional)	53	Number of all conventional dwellings	GEO.L. TOB.
Dwellings by period of construction (optional)	53	Number of all conventional dwellings	GEO.L. POC.

The reference hypercubes (2) for the weights worig mentioned under Annex II, points 2.1.1. (5) and (6) are:

—	hypercube (2) No 42 for natural persons (3);

—	hypercube (2) No 52 for families (3);

—	hypercube (2) No 5 for private households (3);

—	hypercube (2) No 59 for living quarters (3);

—	hypercube (2) No 53 for conventional dwellings (3).

---

(1)  As listed in Annex I to Regulation (EU) No 519/2010.

(*1)  As listed in Annex I to Regulation (EU) No 519/2010.

(*2)  For topics where data records are weighted in the process of generating the required statistical output, the weights used for the reference hypercube below provide the basis for the quality-related data as required by Annex II, points 2.2.1. (7), (8) and (9).

(*3)  The code identifies the breakdown as specified under this code in the Annex to Regulation (EC) No 1201/2009.

(2)  As listed in Annex I to Regulation (EU) No 519/2010.

(3)  Statistical units on which the data source reports.