Central Statistical Bureau of Latvia

The 2016 AES focuses on people aged 25-64.

Central Statistical Bureau of Latvia (CSB) Address Register

• Probability
• random
• stratified
• multi-stage

Census enumeration units

Individuals

"For stratification was used urbanisation (Capital city, Large city, Small city, rural areas)." (Eurostat: 2016 AES Quality Report LV)

"Sample was made as two stage simple random sample. First stage PSU was Census counting area. For stratification was used urbanisation (Capital city, Large city, Small city, rural areas). FSU was selected individuals by simple random method. In FSU strata was made from degree of urbanisation taking into account urbanisation density. Also stratification in FSU was done by age groups and sex." (Eurostat: 2016 AES Quality Report LV)

01-10-2016

15-02-2017

No

Survey

• 51.1 % CAPI
• 37.7 % CATI
• 11.2 % Websurvey

"Design weights were corrected by non-response and for final weights we use calibration by number of population." (Eurostat: 2016 AES Quality Report LV)

STATEC (Institut national de la statistique et des études économiques - Luxembourg)

The 2016 AES focuses on people aged 25-64.

population register (

• Probability
• random
• not stratified
• one stage

No stratification or quota were used.

23-09-2016

31-03-2017

No

Survey

• 6.7 % Self-administered
• 93.3 % Websurvey

"The grossing-up weights (RESPWEIGHT and NFEACTWEIGHT) have been calculated according to Eurostat rules as the ratio population/respondents for each cell (using age, educational attainment and sex as criteria) and after adjustment for unit non-response." (Eurostat: 2016 AES Quality Report LU)

Statistics Lithuania

The 2016 AES focuses on people aged 25-64.

Population Register

• Probability
• random
• not stratified
• one stage

Individuals

Not used

01-09-2016

30-11-2016

No

Survey

• 94.5 % CAPI
• 5.5 % Websurvey

-

-

No

• 100 % CAPI

National Institute of Statistics

The 2016 AES covers the resident population aged 25-64 years.
The national Adult Education Survey also covered persons 18-24 years and 65-69 years old. Since only data for 25-64 years old population are published by Eurostat, all the information in this Quality Report strictly refers to this specific age group.

master sample (EMZOT - i.e. the Multifunctional Sample of Territorial Areas)

• Probability
• random
• stratified
• multi-stage

Area units

Dwellings

"Stratification concerns only the first stage sampling. There are 88 strata and the criteria used being the area of residence where a certain PSU is located (urban or rural area) and county (NUTS 3 level)." (Eurostat: 2016 AES Quality Report RO)

01-09-2016

10-10-2016

No

Survey

• 100 % PAPI

"The weights were calculated in three steps. The first step assigns the inverse of the selection probabilities to each sampled dwelling unit. The second step adjusts for non-response, categorising the responding dwelling units by the following characteristics: county (NUTS 3) and urban/rural residency. The third and final steps consists of calibrating the secondary weights to the best latest available population totals by region (NUTS 3), urban-rural residency, gender, 4 age groups (25-34 year; 35-44 years; 45-54 year; 55-64 years) and the number of households totals by region, using the SAS macro Calmar." (Eurostat: 2016 AES Quality Report RO)

Statistics Norway

The 2016 AES covers individuals permanently residing in Norway (excluding Svalbard) aged 25-64. Individuals living in institutions were excluded.

Central Population Register

• Probability
• random
• stratified
• one stage

Individuals

Not used

"The sample was stratified by gender, educational attainment and three age groups (25-34 years, 35-49 years, 50-65 years)." (Eurostat: 2016 AES Quality Report NO)

10-2016

02-2017

No

Survey

• 53 % CATI
• 47 % Websurvey

Hungarian Central Statistical Office

The 2016 AES covers the resident population aged 25-64 in private households,

Additional age groups

a) 18-24, N = 768 768
b) 65-69, N = 583 110

Registry of Dwellings which is based census 2011

• Probability
• random
• stratified
• multi-stage

"localities are stratified by county and size. For some counties we further stratified localities by unemployment rate. Each of the 155 largest towns is a stratum of its own (self-representing towns). Besides, we have 93 strata for the smaller, non self-representing localities (these strata constitute the two-stage part of the sample design)."
(Eurostat: 2016 AES Quality Report HU)

"In each self-representing towns we have a one-stage selection of dwellings with equal probability systematic random selection method, while in the non self-representing localities’ strata we applied a two-stage sampling, where PSU-s are the localities with pps selection (probability proportional to size) and SSU-s are dwellings with sys (systematic random selection). Within a selected dwelling each individual in scope was observed."
(Eurostat: 2016 AES Quality Report HU)

01-01-2017

10-04-2017

No

Survey

• 91.6 % CAPI
• 8.4 % Websurvey

"Weighting was carried out in three steps. The design weight is defined by the sample design.

1) The first step of weighting is the adjustment for non-response. The probability of response was estimated with logistic regression by NUTS2 regions and type of locality, using dwelling level census data as covariates.

2) Next we applied integrative, household-level calibration with the following constraints:
•population counts by region*gender*age-group
•population counts by region*degree of urbanization
•population counts by region*type of locality

3) At the final step we made some light correction for within-household non-response." (Eurostat: 2016 AES Quality Report HU)

INSEE - DARES

Resident population in private households aged 25-64. People aged 18-24 have been included in the survey.

enumeration areas (Zones d’Activité Enquêteurs: ZAEs [literally, “areas assigned to enumerators”]) of the 2015 population census survey.

• Probability

Individuals

Not used

"The selection of ZAEs [Zones d’Activité Enquêteurs] is stratified by administrative region. In each ZAE the sampling frame is balanced. The balancing variables are the number of dwellings qualifying as main residences in the communes of the ZAE, the total fiscal income and the number of dwellings of ZAE in densely populated area, in intermediate and in thinly populated area." (Eurostat: 2016 AES Quality Report FR)

"The sampling plan therefore comprises four levels: annual population census survey, enumeration areas, dwellings, and persons surveyed". (Eurostat: 2016 AES Quality Report FR)

10-2016

03-2017

No

Survey

• 100 % CAPI

National Statistical Institute - Bulgaria

Individuals aged 25-64 years. Optional population 18-24 and 65-69 was also included.

2011 Population Census System

• Probability
• random
• stratified
• multi-stage

Area units

Households

"The sampling frame was stratified by administrative-territorial districts in the country (NUTS 3) and the household’s location (urban\rural). As a result 56 strata were formed. Municipalities and settlements were ranged according to the number of their population within each stratum." ( Eurostat: 2016 AES Quality Report BG)

15-11-2016

20-01-2017

No

Survey

• 100 % PAPI

-

-

No

• 100 % PAPI

STATBEL - SPF Economie

The 2016 AES covers the resident population aged 25-64.

National Population Register (September 25, 2016)

• Probability
• random
• stratified
• multi-stage

Individuals

Households

"The 18 sampling strata were determined by crossing the following three variables:
- 3 age groups, based on the individual's age in the middle of the fieldwork period : 25-34, 35-49 and 50-64
- 3 regions : Brussels Capital region, Walloon region and Flemish region
- 2 sexes" (Eurostat: 2016 AES Quality Report BE)

01-11-2016

31-03-2017

No

Survey

• 55.1 % Self-administered
• 44.9 % Websurvey

"The weighting procedure was performed in one step. Calibration was also used to correct for non-response. It was done at individual level using truncated linear method. The calibration variables are:
- Size of the household (1, 2-4, 5 or more members)
- Nationality (Belgian, non-Belgian)
- ISCED classification (0-200, 300-400, 500-800)
- Full crossing of 3 regions, 3 age groups and 2 sexes
- Employment status (employed, unemployed, inactive)" (Eurostat: 2016 AES Quality Report BE)

Kantar Public; Kantar Deutschland GmbH

The 2016 AES covers the resident population aged 25-64, total number of people in the population (in thousand): N=44.769. Additional age groups

a) 18-24, number of people: N=6.228
b) 65-69, number of people: N=4.009

• Probability
• random
• stratified
• multi-stage

Three-stage sampling:
First stage: Selection of PSUs
Second stage: Selection of households using a random walk
Third stage: Random selection of an individual household member as respondent (FSU)

-

-

No

Survey

• 100 % CAPI

Statistics Finland

The statistical units for the 2016 AES are the individuals and the learning activities.

Population database maintained by Statistics Finland, 2012

• Probability
• random
• stratified
• one stage

Individuals

Not used

"Stratification according to age categories. [...]
Systematic random sampling from the frame which was sorted by the domicile code (i.e. unique address code) which results in implicit geographic stratification in each stratum." (Eurostat: 2016 AES Quality Report FI)

09-01-2017

30-06-2017

No

Survey

• 100 % Mixed Mode Collection

"The sampling frame of four age strata (18-24, 25-34, 35-64, 65-69) was taken into account in the design weights. These design weights were first corrected with the inverse of the response probability within these groups and then calibrated in order to correct the non-response and to improve the accuracy. In groups 25-34 and 35-64 the calibration classes were "education level*age group" (3*4) and "gender*region" (2*18). In groups 18-24 and 65-69 only post stratification "gender*greater region" (2*3) was conducted." (Eurostat: 2016 AES Quality Report FI)

Statistics Denmark

Permanent residents aged 25-64 years.

Central Person Register (CPR)

• Probability
• random
• stratified
• one stage

Individuals

Not used

01-2017

05-2017

No

Survey

• 29.6 % CATI
• 70.4 % Self-administered

Statistics Austria

The 2016 AES focuses on people aged 25-64.

Central Register of Residents (ZMR)

• Probability
• random
• stratified
• one stage

Individuals

"For the Austrians of age 25-64 years the strata are defined by interviewer region and 3 groups with different NFE participation probabilities. These 3 groups use the variables age, gender, nationality and education. The total sample size was determined by precision requirements as defined in the regulation." (Eurostat: 2016 AES Quality Report AT)

01-10-2016

31-03-2017

No

Survey

• 97.4 % CAPI
• 2.6 % Websurvey

"Weighting was performed by iterative proportional fitting according to the distribution of the number of persons in AgeGroups(4) X Education X Gender, AgeGroups(8) X Gender, Gender X Occupational Status and NUTS2. Different non-response models were tested, however since the models performed poorly it was decided to skip the step." (Eurostat: 2016 AES Quality Report AT)

Czech Statistical Office

Permanent residents aged 25 to 64 years, living in private households. Coverage of the optional age groups 18 to 24 years and 65 to 69 years old.

Czech census enumeration unit register

• Probability
• random
• stratified
• multi-stage

Census enumeration units

Dwellings

"The sampling of CEUs is stratified by region (NUTS4) and municipality size with following ten categories:
- below 200 inhabitants
- 200 – 499 inhabitants
- 500 – 999 inhabitants
- 1 000 – 1 999 inhabitants
- 2 000 – 4 999 inhabitants
- 5 000 – 9 999 inhabitants
- 10 000 – 19 999 inhabitants
- 20 000 – 49 999 inhabitants
- 50 000 – 99 999 inhabitants
- 1000 000 and more inhabitants" (Eurostat: 2016 AES Quality Report CZ)

07-2016

12-2016

No

Survey

• 81.7 % CAPI
• 4.8 % CATI
• 13.5 % PAPI

"The CALMAR software was used for calibration. The truncated linear method provides trimming. Only calibration was used as the method for correcting non-response.
Factors used:
- Gender
- Age groups; (18-24, 25-34, 35-44, 45-54, 55-69)
- NUTS; each NUTS 3" (Eurostat: 2016 AES Quality Report CZ)

Statistical Service of Cyprus (CYSTAT)

The 2016 AES covered the household population aged 25-64 permanently residing in Cyprus.

households from the 2011 Census of Population

• Probability
• random
• stratified
• one stage

Households

"Geographical stratification criteria were used (district and area, urban/rural) for the sample selection. The households were stratified in 9 strata based on District (Urban & Rural), i.e. 1=Lefkosia urban, 2=Lefkosia Rural, 3=Ammochostos Rural (1), 4=Larnaka Urban, 5=Larnaka Rural, 6=Lemesos Urban, 7= Lemesos Rural, 8=Pafos Urban, 9=Pafos Rural." (Eurostat: 2016 AES Quality Report CY)

01-09-2016

12-2016

No

Survey

• 92.8 % CAPI
• 6 % CATI
• 0.7 % PAPI
• 0.5 % Mixed Mode Collection

Statistics Sweden

The registered resident population aged 25-64.

Swedish total population register (TPR)

• Probability
• random
• stratified
• one stage

Individuals

Not used

"There were 18 strata constructed from a combination of age, sex and educational attainment."(Eurostat: 2016 AES Quality Report SE)

06-09-2016

16-03-2017

No

Survey

• 100 % CATI

-

-

No

• 100 % Mixed Mode Collection

-

-

No

• 18.8 % CAPI
• 8.8 % CATI
• 72.4 % PAPI

-

-

No

• 100 % CATI

Istat - National Institute of Statistics

The 2016 AES covers the resident population living in private households.

Public Registry

• Probability
• random
• stratified
• one stage

Individuals

Not used

" (...) the strata defined by the combination of the modalities of the following planned domains: territorial unit (the North-West, the North–East, the Centre and the South with the Islands), municipality typology, gender, and age class." (Eurostat: 2016 AES Quality Report IT)

01-05-2017

04-09-2017

No

Survey

• 100 % CATI

-

-

No

• 100 % CAPI

National Statistics Office Malta

The 2016 AES covers the resident population aged 25-64 living in private households.

internally maintaned and updated Population and Dwellings Register

• Probability
• systematic
• stratified
• one stage

Households

Not used

"The order of selection on the sampling frame was on the made on the basis of geographical coverage, number of males and females in the household and total number of persons in the household aged 25-44 and 45-64." (Eurostat: 2016 AES Quality Report MT)

19-10-2016

07-12-2016

No

Survey

• 93.4 % CAPI
• 6.1 % CATI
• 0.5 % Websurvey

Central Statistical Office of Poland (CSO Poland)

The 2016 AES covers the resident population aged 25-64. Persons living in collective or institutional households are excluded from the target population.

National Official Register of Territorial Division of the Country (TERYT)

• Probability
• stratified
• multi-stage

Area units

Dwellings

"Stratification was carried out separately in each voivodship (NUTS2) with consideration to its specifics. Primary sampling units were stratified according to the size of a locality. In urban areas, census enumeration areas were aggregated according to the size of towns. Cities comprised independent strata, while in the five largest cities the strata were city districts. In turn, in rural areas, the strata consisted of rural gminas (NUTS5) in subregion (NUTS3), or relatively with a few neighbouring powiats (NUTS4). Overall, there were created 205 strata." (Eurostat: 2016 AES Quality Report PL)

"PSUs were selected with the use of Hanurav-Vijayan method (implemented in SAS SURVEYSELECT procedure). Separately in each stratum, a determined number of units was selected with probability proportional to the number of dwellings. Next, in each selected PSU a selection of dwellings was carried out with the use of simple sampling procedure." (Eurostat: 2016 AES Quality Report PL)

02-01-2017

30-03-2017

No

Survey

• 80.7 % CAPI
• 19.3 % PAPI

"The applied weighting procedure included the following elements:
1. probability of dwelling selection,
2. level of completeness of the interviews in households,
3. level of completeness of individual interviews.
The above factors comprised general level of completeness on the level NUTS 2 and were used for preliminary correction of weights. Then, weights were calibrated separately for each voivodship (NUTS 2) with the use of data from current demographic estimates concerning sex, age (18-24 group and nine 5-year age groups), and place of residence (urban or rural areas).Weights for 10 larger voivodships were calibrated according to distribution covering simultaneously three variables, i.e. sex x age groups x urban/rural areas. For 6 smaller voivodships were created three marginal distributions in the following form:
- urban/rural areas x sex x age groups,
- NUTS 2 x urban/rural areas x age groups,
- NUTS 2 x sex x age groups,
- NUTS 2 x urban/rural areas x sex.
Calibrated weights were calculated with the use of the specially created program in the R system. The applied calibration procedure was analogous to the one applied in the EU-SILC." (Eurostat: 2016 AES Quality Report PL)

Statistics Portugal

The PT 2016 AES covers the resident population aged 18-69.
The PT 2016 AES considers only individuals living in dwellings of main residence in national territory. Persons in collective households are excluded.

National Dwellings Register

• Probability
• random
• stratified
• multi-stage

Area units

Dwellings

"The AES sample follows a stratified two-stage cluster design, where the strata are the NUTSII regions, the primary units - PSUs (Primary Sampling Units, areas consisting of one or more square cells with 1km of side from the European grid INSPIRE) were selected in each one of the 7 regions likely to be proportional to the size of their number of dwellings of main residence; the secondary units - the SSU (Secondary Sampling Units, dwellings) were systematically selected within the units of the first stage." (Eurostat: 2016 AES Quality Report PT)

-

-

No

Survey

• 100 % CAPI

"determination of the design weight, which incorporates the survey design information and is given by the inverse probability of selection of each statistical unit" (Eurostat: 2016 AES Quality Report PT)

"application of a correction factor for non-response to the weight calculated in the first step" (design weight) (Eurostat: 2016 AES Quality Report PT)

"the final weight is derived as the product of the weight obtained in 2 and a factor that calibrates the sample to the results of the 2011 Census (using a posteriori stratification method by NUTS 2, sex and age groups)" (Eurostat: 2016 AES Quality Report PT)

Statistical Office of the Republic of Serbia

Population aged 25-64, excluding the persons in collective households, diplomatic and consular personnel. No additional age groups were included.

Population Census conducted in 2011

• Probability
• random
• stratified
• multi-stage

Area units

Households

"Stratification of enumeration districts (PSUs) was done according to type of settlement (urban and other) and 25 areas (NUTS3 level). " (Eurostat: 2016 AES Quality Report RS)

15-10-2016

20-01-2017

No

Survey

• 100 % CATI

"Initial weight was adjusted for nonresponse, at the level of household and individual. The final weight for a person was calculated on the basis of the corrected weight for an individual that benchmark the estimates agree to current demographic projections, by post-stratification, according to the gender and five year age groups (25-29, ..., 60-64), at the level of the Republic of the Serbia." (Eurostat: 2016 AES Quality Report RS)

Swiss Federal Statistical Office

The 2016 AES in Switzerland covers the resident population aged 15-74 (31.12.2015). Persons in collective households are excluded.

cantonal and communal population registers

• Probability
• random
• stratified
• multi-stage

Households

Individuals

stratified by cantons

04-04-2016

21-12-2016

No

Survey

• 100 % CATI

"The weighting takes into account the probability of selection and non-response. The weights were calibrated on the sex, age, civil state, nationality and cantons." (Eurostat: 2016 AES Quality Report CH)

Instituto Nacional de Estadística (INE)

The 2016 AES covers the resident population aged 25-64, with exclusion of people living in collective houses. The Spanish survey also covers population aged 18-24.

• Probability
• random
• stratified
• multi-stage

Census enumeration units

Individuals

"The stratification criterion is the same as that of the ECH but defined at the level of the autonomous community. The strata are defined according to the size of the municipality to which they belong:
Stratum 1: Provincial capital municipalities
Stratum 2: Self-represented municipalities, important in relation to the capitals.
Stratum 3: Other self-represented municipalities, important in relation to the capitals or municipalities over 100,000 inhabitants.
Stratum 4: Municipalities between 50,000 and 100,000 inhabitants.
Stratum 5: Municipalities between 20,000 and 50,000 inhabitants.
Stratum 6: Municipalities between 10,000 and 20,000 inhabitants.
Stratum 7: Municipalities between 5,000 and 10,000 inhabitants.
Stratum 8: Municipalities between 2,000 and 5,000 inhabitants.
Stratum 9: Municipalities under 2,000 inhabitants.
People are selected within each stratum with equal probability, by systematic sampling with random start.
" (Eurostat: 2016 AES Quality Report ES)

"PSU selected with probability proportional to size and FSU with equal probability." (Eurostat: 2011 AES Quality Report ES)

03-02-2017

31-03-2017

No

Survey

• 15.6 % CAPI
• 30.8 % CATI
• 45.6 % Websurvey
• 8 % Mixed Mode Collection

"calculation of design weights that are the inverse of the probability of selection" (Eurostat: 2011 AES Quality Report ES)

"Non-response correction within strata. Ratio estimator with auxiliary variable the population at reference time (obtained from demographic forecasts)"
(Eurostat: 2011 AES Quality Report ES)

"benchmark to sex and group of ages, nationality and population of NUTS3 (within NUTS2)" (Eurostat: 2011 AES Quality Report ES)

Statistics Netherlands

The 2016 AES covers permanent residents aged between 25 and 64 years old. Persons who are part of the institutionalised population (living in collective households) were excluded from the survey.

Municipal basic registration of population

• Probability
• systematic
• stratified
• multi-stage

Municipality

Individuals

"For the stratification the country is split into 56 strata (areas) that are combinations of 40 Corop areas and 13 interviewing areas (Corop = Commitee for the Co-ordination of a Regional Research Programme)." (Eurostat: 2016 AES Quality Report NL)

"The AES utilised a two-stage sampling procedure. The first stage was a stratified systematic probability proportion to size (PPS) sample of municipalities. This means that municipalities are selected within each stratum with probabilities proportional to their population numbers (municipalities in random order). [...]. Subsequently, sample sizes of persons for the selected municipalities are determined. In the second stage a random sample of persons is drawn from the selected municipalities." (Eurostat: 2016 AES Quality Report NL)

03-01-2017

31-03-2017

No

Survey

• 100 % Mixed Mode Collection

"The final sample weights of the LFS are used as the starting points of the design weights for the AES. The starting weight is the same for each person in the sample as each person has the same inclusion probability. Using a linear weighing method, a correction factor is calculated. This calibration process adjusted the starting weights so that the estimated totals in the gender-age group (2x4), the education level (6), degree of urbanisation (5), origin-gender group (3x2), household type (3) and the work status (5), fitted the corresponding population values. The final AES weight is equal to the starting weight times the correction factor." (Eurostat: 2016 AES Quality Report NL)

Statistics Estonia

Permanent residents of Estonia aged 20–64, excluding persons living in institutions (children’s homes, care homes, monasteries, convents, etc.).

2011 Population and Housing Census and the Population Register

• Probability
• random
• stratified
• one stage

Individuals

Not used

"Data has been collected by stratified random sampling by age and sex." (Eurostat: 2016 AES Quality Report EE)

01-07-2016

31-12-2016

No

Survey

• 18.5 % CAPI
• 81.5 % CATI

Hellenic Statistical Authority

The Adult Education Survey in Greece covers the residents population living in private households aged 18 - 64 years old.

The basic sampling frame is an area frame: it is a full list of all building blocks in Greece, compiled at the last census.

• Probability
• systematic
• stratified
• multi-stage

Area units

Dwellings

"The whole country was divided in 180 strata. These strata were defined in each NUTS III area by allocating the Municipalities and Communes according to the degree of urbanization (Densely, Intermediate and Thinly populated areas). An exception to this rule is the Greater Athens Area and the Greater Thessaloniki Area that were divided into strata formed by municipalities." (Eurostat: 2016 AES Quality Report EL)

01-10-2016

31-12-2016

No

Survey

• 100 % PAPI

"Weights are computed in a 3 – step procedure.
In the first step, a design weight is assigned to each person in the data file. This weight is determined by the estimated probability of selection of the particular household where the person lives in.

In the second step, a non response correction factor is computed, at primary unit level:

Non response correction = number of eligible households in primary sampling unit/number of households that responded.

At the third step, data are post stratified: Totals are computed for 208 post – stratification cells, which are defined by 13 NUTS II areas x 8 age groups x sex. These totals are estimated by weighting sample data (individuals) by design weights and non response correction factor. Finally, post stratification correction factors are computed for each individual so that estimations from Adult Education Survey are consistent with estimated (from Labour Force Survey) population totals for post - stratification cells." (Eurostat: 2016 AES Quality Report EL)