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Study: AES 2011
Titles
| Title | 2011 Adult Education Survey (AES) |
|---|---|
| Subtitle |
Abstract
"After the first pilot exercise, the Adult Education Survey is run under a legal basis: Framework Regulation (EC) 452/2008, which makes it a compulsory European survey.
Therefore the second AES data colletion, 2011 AES took place in 2011 and 2012. It was the first to be run under the Framework Regulation and it was implemented by the Commission Regulation (EC) 823/2010." (http://ec.europa.eu/eurostat/web/microdata/adult-education-survey)
Coverage
Geographical Coverage
"The anonymised 2011 AES microdata are available on CD-Rom including the national datasets of 30 countries which implemented the survey: BE, BG, CZ, DK, DE, EE, IE, EL, ES, FR, IT, CY, LV, LT, LU, HU, MT, NL, AT, PL, PT, RO, SI, SK, FI, SE, UK, NO, CH and RS (Republic of Serbia).
Croatia, Iceland and Liechtenstein did not take part in the 2011 AES data collection. Turkey implemented a survey on adult education in 2012 but the data are not available in the AES format yet."
(http://ec.europa.eu/eurostat/web/microdata/adult-education-survey)
Time Period Covered
2011-2012
Notes
-
References
Country Specific Information: AES 2011
-
LV - Latvia
National Reference
Corresponding National Study
-
Producer
Central Statistical Bureau of Latvia
Universe
The target population of the Survey were permanent residents in the age of 25 to 64 years living in individual households.
Target Sample Size
Cross-sectional Data Achieved Sample Size 5048 Available Data
- Cross-sectional
Sampling Procedure
Source Of Sampling Frame
Central Statistical Bureau of Latvia (CSB) Address Register
Sampling Design
- Probability
- random
- stratified
- multi-stage
Primary Sampling Units
Census enumeration units
Secondary Sampling Units
Individuals
Stratification Criteria
"For stratification was used urbanisation (Capital city, Large city, Small city, rural areas)." (Eurostat: 2011 AES Quality Report LV)
Sampling Method
"Sample was made as two stage simple random sample. First stage PSU vas Census counting area. [...]. FSU was selected individuals by simple random method. In FSU stata was made from degree of urbanisation taken in to accout urbanisation density. Also statification in FSU was done by age groups and sex." (Eurostat: 2011 AES Quality Report LV)
Data Collection
Start Date
13-12-2010
End Date
31-12-2010
Participation Mandatory
Yes
Type Of Data Source
Survey
Interview Mode
- 100 % CAPI
Percentage Of Proxy Interviews
0 %
Weighting
Weighting: Method
"Design weights was corected by nonresponse and for final weights we use calibration by number of population." (Eurostat: 2011 AES Quality Report LV)
Notes
-
References
-
LU - Luxembourg
National Reference
Corresponding National Study
-
Producer
Responsible organisation: STATEC Subcontractors: TNS ILRES SA/ SOGETI
Universe
Residents aged 25 to 64 years
Target Sample Size
Cross-sectional Data Achieved Sample Size 3310 Available Data
- Cross-sectional
Sampling Procedure
Source Of Sampling Frame
web panel
Sampling Design
- Probability
- one stage
Stratification Criteria
No stratification or quota were used.
Sampling Method
"Sampling has been done systematically using the following procedure :
1) random mix of the panelists
2) the sampling interval K = 6 (one individual is to be chosen out of 6)
3) random choice of a number between 1 and 6, being the origin (O)
4) 1rst monthly sample defined by the Kth number after the origin O
2nd monthly sample defined by the Kth number after the origine O+1
etc. until the 5th monthly sample.
As the panel consists of individuals, households were not part of the sampling method."
(Eurostat: 2011 AES Quality Report LU)Data Collection
Start Date
01-2012
End Date
06-2012
Participation Mandatory
No
Type Of Data Source
Survey
Interview Mode
- 100 % Websurvey
Percentage Of Proxy Interviews
0 %
Weighting
Weighting: Method
"Regarding the weighting procedure, we used the SAS Macro "Calmar" available on the INSEE website.
This macro can correct a sample, by weighting of individuals using auxiliary information available on a number of variables, called calibration variables." (Eurostat: 2011 AES Quality Report LU)Notes
-
References
-
LT - Lithuania
National Reference
Corresponding National Study
-
Producer
Statistics Lithuania
Universe
The target population of the survey were persons at the age of 18 to 69 years
Target Sample Size
Cross-sectional Data Achieved Sample Size 5388 Available Data
- Cross-sectional
Sampling Procedure
Source Of Sampling Frame
Population Register
Sampling Design
- Probability
- random
- not stratified
- one stage
Primary Sampling Units
Individuals
Secondary Sampling Units
Not used
Data Collection
Start Date
02-01-2012
End Date
30-03-2012
Participation Mandatory
Yes
Type Of Data Source
Survey
Interview Mode
- 100 % PAPI
Weighting
Design Weight: Method
"Assumption: non-respondents constitute the simple random sample from the population, therefore number of respondents is used to construct the design weights instead of the sample size. " (Eurostat: 2011 AES Quality Report LT)
Coverage Adjustment Weight: Method
"The following calibration groups are used: crossclasification of population by sex, urban/rural living place and 5 age groups e. g. 20 groups and 7 territory groups. SAS macro program CLAN of Statistics Sweden has been used for calculation of the calibrated weights and estimates of the variances of the estimators." (Eurostat: 2011 AES Quality Report LT)
Notes
-
References
-
RO - Romania
National Reference
Corresponding National Study
Ancheta privind Educatia Adultilor (AEDA)
Producer
National Institute of Statistics
Universe
Permanent residence aged 18-69 years.
Target Sample Size
Cross-sectional Data Achieved Sample Size 13651 Available Data
- Cross-sectional
Sampling Procedure
Sampling Design
- Probability
- random
- stratified
- multi-stage
Primary Sampling Units
Area units
Secondary Sampling Units
Dwellings
Stratification Criteria
"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: 2011 AES Quality Report RO)
Sampling Method
"In the first stage, a stratified random sample of 780 areas, Primary Sampling Units (PSU’s), was designed after the 2002 Census. The primary sampling unit, corresponding to the selection of the master sample, is a group of census sections. The including probabilities from the first stage were proportionaly calculated with the size, expressed in number of permanent dwellings.
In the second stage, the dwellings are systematically selectedl: 13 dwellings from each PSU. The secondary (ultimate) sampling unit, corresponding to the selection of the survey sample, has been the dwelling. All households within each sampling unit are included." (Eurostat: 2011 AES Quality Report RO)Data Collection
Start Date
17-08-2011
End Date
31-08-2011
Participation Mandatory
Yes
Type Of Data Source
Survey
Interview Mode
- 100 % PAPI
Percentage Of Proxy Interviews
16.4 %
Weighting
Design Weight: Method
inverse of the selection probabilities to each sampled dwelling unit
Non-response Weight: Method
categorising the responding dwelling units by the following characteristics: county (NUTS 3 level) and urban/rural residency
Coverage Adjustment Weight: Method
"The third and final steps consists of calibrating the secondary weights to the best latest available population totals by region / urban-rural residency, gender, 4 age groups and the households totals by region(NUTS 2 level), using the SAS macro Calmar" (Eurostat: 2011 AES Quality Report RO)
Weighting: Method
"In the calculation of weighting factors the totals known at population level from current demographic statistics, recalculated on 2002 Census population, available at 1st of January 2011 are used. The current demographic statistics used to calibrate the AES weights include the institutional population, too." (Eurostat: 2011 AES Quality Report RO)
Notes
-
References
-
NO - Norway
National Reference
Corresponding National Study
-
Producer
Statistics Norway
Universe
Individuals and learning activities covering persons residing in Norway (not including Svalbard). Age range 25-64 and optional age group 18-24 and 65-69.
Target Sample Size
Cross-sectional Data Achieved Sample Size 3336 Available Data
- Cross-sectional
Sampling Procedure
Source Of Sampling Frame
Central Population Register
Sampling Design
- Probability
- random
- stratified
- one stage
Primary Sampling Units
Individuals
Secondary Sampling Units
Not used
Stratification Criteria
"The sample was stratified by five age groups (18-24, 25-34, 35-49, 50-64 and 65-69), mainly to assure a sufficient sample size in the age categories used in the data reported internationally." (Eurostat: 2011 AES Quality Report NO)
Data Collection
Start Date
03-2012
End Date
06-2012
Participation Mandatory
No
Type Of Data Source
Survey
Interview Mode
- 1.3 % CAPI
- 98.7 % CATI
Percentage Of Proxy Interviews
0 %
Weighting
Weighting: Method
"The estimator used in the Norwegian AES is a regression estimator, where auxiliary information has been used to reduce bias from sampling errors and non-response-errors." (Eurostat: 2011 AES Quality Report NO)
Notes
-
References
-
HU - Hungary
National Reference
Corresponding National Study
-
Producer
Hungarian Central Statistical Office
Universe
The target population are individuals aged 25-64, living in private households in Hungary.
Target Sample Size
Cross-sectional Data Achieved Sample Size 7367 Available Data
- Cross-sectional
Sampling Procedure
Sampling Design
- Probability
- random
- stratified
- multi-stage
Primary Sampling Units
Dwellings
Secondary Sampling Units
Dwellings
Stratification Criteria
"Localities are stratified by county (20) and size (10 categories of equal weights are defined). For some counties we further stratified localities by unemployment rate. Each of the 144 largest towns (in size category 5-10) is a stratum of its own (self-representing towns). Besides, we have 86 strata for the smaller, non self-representing localities."
(Eurostat: 2011 AES Quality Report HU)Sampling Method
"In each self-representing towns we have a one-stage selection of dwellings with srs, while in the non self-representing localities’ strata we applied a two-stage sampling, where PSU-s are the localities with pps selection and SSU-s are dwellings with srs. Within a selected dwelling each individuals were observed."
(Eurostat: 2011 AES Quality Report HU)Data Collection
Start Date
02-01-2012
End Date
31-03-2012
Participation Mandatory
No
Type Of Data Source
Survey
Interview Mode
- 100 % PAPI
Percentage Of Proxy Interviews
48 %
Weighting
Weighting: Method
"Design weight is defined by the sample design.
At the first step of weighting is the adjustment for non-response. At locality level we multiplied the design weight with a factor (nr of occupied dwellings)/(nr of respondent dwellings).
Next we applied integrative, household-level calibration with the following constraints:
- population counts by region*gender*age_group (0-14, 15-19, 20-24, 25-29, 30-34, 35-39, 40-44, 45-49, 50-54, 55-59, 60-64, 65-74, 75-xx)
- population counts by region*degree of urbanization
- household numbers by region*size of household (with members 1, 2, 3, 4-xx)
At the final step we made some light correction for within-household non-response."
(Eurostat: 2011 AES Quality Report HU)Notes
-
References
-
FR - France
National Reference
Corresponding National Study
-
Producer
INSEE - DARES
Universe
Permanent residents aged 25 to 64 years, coverage of the optional age group 18 to 24 years old.
Target Sample Size
Cross-sectional Data Achieved Sample Size 13857 Available Data
- Cross-sectional
Sampling Procedure
Source Of Sampling Frame
2010 population census survey
Sampling Design
- Probability
- random
- stratified
- one stage
Stratification Criteria
"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: 2011 AES Quality Report FR)
Sampling Method
"The sampling plan therefore comprises four levels: annual population census survey, enumeration areas, dwellings, and persons surveyed". (Eurostat: 2011 AES Quality Report FR)
Data Collection
Start Date
04-2012
End Date
06-2012
Participation Mandatory
Yes
Type Of Data Source
Survey
Interview Mode
- 100 % CAPI
Percentage Of Proxy Interviews
0 %
Weighting
Non-response Weight: Method
"Correction of non response by the calculation of response probabilities of households, with a logit model."
(Eurostat: 2011 AES Quality Report FR)Coverage Adjustment Weight: Method
"We calibrate on the Labour Force Survey data the weights after correction of non response.
First, to get an individual weight from household weight we multiply household weight by the number of persons in household in the AES scope of coverage.
Then we calibrate individual weights on the Labour Force Survey data between 4th trimester 2011 and 3rd trimester 2012." (Eurostat: 2011 AES Quality Report FR)Notes
-
References
-
BG - Bulgaria
National Reference
Corresponding National Study
-
Producer
National Statistical Institute - Bulgaria
Universe
The objects of the survey are non-institutional households. All persons aged 18 -64 years, members of the selected households are interviewed.
Resident population of Bulgaria is covered by the Adult Education Survey. Foreign nationals, except diplomats working at the foreign embassies and members of their families, are included in the resident population if they have lived in Bulgaria for more than one year.Target Sample Size
Cross-sectional Data Achieved Sample Size 6173 Available Data
- Cross-sectional
Sampling Procedure
Source Of Sampling Frame
Population Census 2011
Sampling Design
- Probability
- random
- stratified
- multi-stage
Primary Sampling Units
Households
Secondary Sampling Units
Individuals
Stratification Criteria
"The sample is stratified by administrative-territorial districts in the country (NUTS3) and the household’s location. As a result 56 strata are formed (28 of urban and 28 of rural population).
The number of census enumeration units (PSU) is calculated for each strata included in the sample.
The clusters on the first stage are chosen with probability proportional to population size (number of households) in the PSUs. Systematic sampling of the secondary units (households) selected in each primary unit is applied. Each PSU contains the same size - 6 households. All individuals aged 18-64 are selected in each sampled household." ( Eurostat: 2011 AES Quality Report BG)Sampling Method
"Two stage sampling on a territorial principle is implemented as follows:
- on the first stage - the census enumeration units (PSU) are selected;
- on the second stage - the private households with population aged 18 - 64 are identified. "
( Eurostat: 2011 AES Quality Report BG)Data Collection
Start Date
01-11-2011
End Date
01-01-2012
Participation Mandatory
No
Type Of Data Source
Survey
Interview Mode
- 100 % PAPI
Weighting
Weighting: Method
"The current demographic data as of 31 December 2011 for the total population is used for weighting and adjustment of the results (...).
The data obtained by the survey is post-stratified by:
-6 geographical area (NUTS2),
-2 type of residence (urban/rural areas),
-2 genders (male/female)
-4 age groups (18-24, 25-34, 35-54 and 55-64).
The total number of poststrata was 94. All units (individuals) in each post-stratum had the same weight (variable RESPWEIGHT). The weight is calculated by dividing the population in each post-stratum by the number of the interviewed persons in the same post-stratum.
The weight for the activities (variable NFEACTWEIGHT) had been estimated following the Eurostat requirements - respondents weights were divided by the number of represented non-formal activities. "( Eurostat: 2011 AES Quality Report BG)Notes
-
References
-
BE - Belgium
National Reference
Corresponding National Study
-
Producer
Statistics Belgium
Universe
Permanent residents in Belgium aged 25-64 and living in private households.
Target Sample Size
Cross-sectional Data Achieved Sample Size 5526 Available Data
- Cross-sectional
Sampling Procedure
Source Of Sampling Frame
Population Register
Sampling Design
- Probability
- random
- stratified
- multi-stage
Primary Sampling Units
Individuals
Secondary Sampling Units
Households
Stratification Criteria
The national territory is divided into 12 (sampling) strata: the Brussels Capital Region (BCR), 5 Flemish and 4 Walloon 'provinces', and finally, the province of Liège is split into the French speaking municipalities and the German speaking municipalities.
Sampling Method
"Within each stratum, sampling is carried out in two stages. The PSUs comprise parts of the municipalities called ‘statistical sections’ (…), if large enough to serve as PSU, or are groupings of such sections to make them large enough for sampling. A PSU's probability of selection is proportional to the number of households in it. Within each stratum, a pre-calculated number of draws of PSUs is carried out by systematic sampling proportional to size (SYS-PPS); the sampling frame of PSUs within each stratum has been sorted on PSUS size (i.e. number of households in the PSU). Consequently, larger PSUs can be selected more than once, while some of the smallest PSUs are likely to be selected not at all. For each draw of a PSU, a 'group' of households has to be selected in the PSU. Thus, the number of PSU draws equals the number of 'groups', which is generally larger then the number of different selected PSUs. (…) Those 23 or 26 households for a group (in a PSU) are selected from a list of eligible households (in that PSU) by simple random sampling (SRS)." (Eurostat: 2011 AES Quality Report BE)
Data Collection
Start Date
10-10-2011
End Date
17-03-2012
Participation Mandatory
No
Type Of Data Source
Survey
Interview Mode
- 75.8 % Self-administered
- 24.2 % Websurvey
Percentage Of Proxy Interviews
0 %
Weighting
Weighting: Method
"Correction for unit non-response and adjustment to (estimated) population figures are done in one single step by the raking ratio method, which is a well-known calibration method. CALMAR is used for this purpose.
The adjustment of the sampling weights is based on the following marginal population distributions of individuals, as estimated from LFS (2011 - 4th quarter - individuals in age class 25-64):
- distribution by REGION (3 NUTS-1 areas) x AGE (3 groups: 25-34, 35-39, 50-64) x GENDER
- distribution by EMPLOYMENT STATUS (3 classes: employed, unemployed, inactive)
- distribution by EDUCATION LEVEL (3 ISCED classes: low (ISCED 0/1/2), medium (ISCED3/4), high (ISCED5/6))
- distribution by nationality (2 classes: Belgian and non-Belgian)
- distribution by household size (3 classes: 1 person in household, 2-4 persons, more than 6 persons)
Nationality and household size are important explanatory variables for non-response.
Population totals are based on the calibrated LFS 2011 (4th quarter - individuals aged 25-64). Since LFS itself is calibrated on the Population Register, using a post-stratification method for individuals, where post-strata are determined by REGION, AGE and GENDER, AES is to some extent indirectly calibrated on the Population Register as well." (Eurostat: 2011 AES Quality Report BE)Notes
-
References
-
DE - Germany
National Reference
Corresponding National Study
-
Producer
TNS Infratest Sozialforschung GmbH
Universe
Target Population of German AES for Eurostat: Persons in private households, 25 to 64 years old. (Data for Germany cover additionally the age group 18 to 24 years)
Target Sample Size
Cross-sectional Data Achieved Sample Size 6213 Available Data
- Cross-sectional
Sampling Procedure
Sampling Design
- Probability
- random
- stratified
- multi-stage
Sampling Method
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)Data Collection
Start Date
01-03-2012
End Date
25-06-2012
Participation Mandatory
Yes
Type Of Data Source
Survey
Interview Mode
- 100 % CAPI
Percentage Of Proxy Interviews
0 %
Weighting
Notes
-
References
-
DK - Denmark
National Reference
Corresponding National Study
-
Producer
Statistics Denmark
Universe
Permanent residents aged 25-64 years.
Target Sample Size
Cross-sectional Data Achieved Sample Size 3660 Available Data
- Cross-sectional
Sampling Procedure
Sampling Design
- Probability
- random
- stratified
- one stage
Primary Sampling Units
Individuals
Secondary Sampling Units
Not used
Data Collection
Start Date
16-08-2011
End Date
03-10-2011
Participation Mandatory
No
Type Of Data Source
Survey
Interview Mode
- 45.4 % CATI
- 54.6 % Websurvey
Percentage Of Proxy Interviews
0 %
Weighting
Notes
-
References
-
FI - Finland
National Reference
Corresponding National Study
-
Producer
Statistics Finland
Target Sample Size
Cross-sectional Data Achieved Sample Size 3605 Available Data
- Cross-sectional
Sampling Procedure
Sampling Design
- Probability
Data Collection
Start Date
-
End Date
-
Participation Mandatory
No
Type Of Data Source
Survey
Interview Mode
- 84 % CAPI
- 16 % CATI
Percentage Of Proxy Interviews
0 %
Weighting
Notes
No Quality Report available.
References
-
IE - Ireland
National Reference
Corresponding National Study
-
Target Sample Size
Cross-sectional Data Achieved Sample Size - Available Data
- Cross-sectional
Sampling Procedure
Sampling Design
Data Collection
Start Date
-
End Date
-
Participation Mandatory
No
Type Of Data Source
Survey
Weighting
Notes
No national Quality Report available.
References
-
AT - Austria
National Reference
Corresponding National Study
-
Producer
Statistic Austria
Universe
Permanent residents aged 25 to 64, coverage of the optional age group 18 to 24 years old.
Target Sample Size
Cross-sectional Data Achieved Sample Size 5754 Available Data
- Cross-sectional
Sampling Procedure
Source Of Sampling Frame
Central Register of Residents (ZMR) in the middle of 2011.
Sampling Design
- Probability
- random
- stratified
Primary Sampling Units
Individuals
Secondary Sampling Units
Not used
Stratification Criteria
For the Austrian population of age 25-64 the strata are defined by 3 age groups (25-34 years, 35-49 years and 50-64 years) and sex. For the Austrian Population of age 18-24 the strata is defined by sex.
Sampling Method
The total sample size was determined by precision requirements as defined in the regulation: Thus the net sample was fixed with a size around 4,900 persons for the population between 25 and 64 years; for the age group between 18 and 24 years the net sample was fixed around 600 persons.
Data Collection
Start Date
03-10-2011
End Date
30-05-2012
Participation Mandatory
No
Type Of Data Source
Survey
Interview Mode
- 100 % CAPI
Percentage Of Proxy Interviews
0 %
Weighting
Design Weight: Method
In the 5 strata (=the 5 age groups <25, <35, <45, <55, <65) the design weight was assigned according to marginal distributions of the Austrian Population forecasts.
Non-response Weight: Method
Non response factors – also within the 5 basic strata were used to inflate the design weights.
Coverage Adjustment Weight: Method
The final calibration was done according to 3 dimensions:
1. Nuts (9 Federal provinces) x sex x age (5 age groups)
2. sex x educational level (8 levels)
3. Labour force status (9 levels)Notes
-
References
-
CZ - Czech Republic
National Reference
Corresponding National Study
-
Producer
Czech Statistical Office
Universe
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.
Target Sample Size
Cross-sectional Data Achieved Sample Size 10190 Available Data
- Cross-sectional
Sampling Procedure
Source Of Sampling Frame
Czech census enumeration unit register
Sampling Design
- Probability
- random
- stratified
- multi-stage
Primary Sampling Units
Census enumeration units
Secondary Sampling Units
Individuals
Stratification Criteria
Region (NUTS3) and municipality size was used for stratification. Final number of stratums was 56.
Data Collection
Start Date
07-2011
End Date
12-2011
Participation Mandatory
No
Type Of Data Source
Survey
Interview Mode
- 100 % CAPI
Percentage Of Proxy Interviews
33% %
Weighting
Non-response Weight: Method
"The original sample was designed as a self-weighting probability sample. Due to the limited information on non-respondents restricted only to the geographical information obtainable from the sampling frame, the possibilities for modelling using propensity to response models were quite limited. Therefore, united calibration for all the waves was used as the method for correcting non-response." (Eurostat: 2011 AES Quality Report CZ)
Coverage Adjustment Weight: Method
"The source for calibration totals was preliminary results of the 2011 Population and Housing Census. The following calibration variables were used: Age groups (18-24, 25-34, 35-44, 45-54, 55+), Gender, NUTS3 population totals, Education levels. The calculations were implemented using the CALMAR software in SAS. " (Eurostat: 2011 AES Quality Report CZ)
Notes
-
References
-
CY - Cyprus
National Reference
Corresponding National Study
-
Producer
Statistical Service of Cyprus
Universe
The target population are individuals aged 25-64, permanently resident in Cyprus.
Target Sample Size
Cross-sectional Data Achieved Sample Size 2404 Available Data
- Cross-sectional
Sampling Procedure
Source Of Sampling Frame
2011 Census of population, restricted to households with at least one member in the age range 25-64.
Sampling Design
- Probability
- random
- stratified
- one stage
Primary Sampling Units
Individuals
Secondary Sampling Units
Not used
Stratification Criteria
"The variables used for stratification were: District and Urban/Rural area. There are 4 districts broken down by urban/rural area and 1 district which is only rural, thus giving 9 strata (Lefkosia urban, Lefkosia rural, Ammochostos rural, Larnaca urban, Larnaca rural, Lemessos urban, Lemessos rural, Pafos urban, Pafos rural)." (Eurostat: 2011 AES Quality Report CY)
Sampling Method
"One individual was selected from each household, randomly using the birth date as a criterion (the person aged 25-64 having his/her birth date first after the interview date was selected). " (Eurostat: 2011 AES Quality Report CY)
Data Collection
Start Date
01-04-2012
End Date
05-2012
Participation Mandatory
Yes
Type Of Data Source
Survey
Interview Mode
- 97.8 % CAPI
- 1.7 % CATI
- 0.2 % PAPI
- 0.3 % Mixed Mode Collection
Percentage Of Proxy Interviews
0 %
Weighting
Design Weight: Method
"The design weight of the household Wi is corrected for non-response using Pi, the estimated response probability of the household within each stratum (i=1 to 9 strata). Then, the corrected design weight of the household W'i is adjusted for all persons in household (Dij , in stratum i and household j) and finally it is calibrated using age and gender to end up with the Final Weight of the Respondent, Rit (in stratum i, respondent t)." (Eurostat: 2011 AES Quality Report CY)
Non-response Weight: Method
"The Design Weight of the household Wi was corrected for Non-Response by multiplying it with the inverse of the Response Rate. The Response Rate Pi , was calculated by dividing the eligible sample of households that responded to the survey by the total number of eligible households in the sample.
(The Response Rate within each stratum provides an estimate of the response probability for all the households of the stratum.)" (Eurostat: 2011 AES Quality Report CY)Coverage Adjustment Weight: Method
"The Final Respondent Weight was calculated by calibrating the Design Weight of the respondent. This was done in order to improve the accuracy of the estimated respondent weights using external known information. The calibration variables used were the distribution of the population by age group (25-29,30-34, 35-39,...,60-64) and gender." (Eurostat: 2011 AES Quality Report CY)
Notes
-
References
-
SE - Sweden
National Reference
Corresponding National Study
-
Producer
Statistics Sweden
Universe
The target population are individuals aged 25-64, permanently living in Sweden.
Target Sample Size
Cross-sectional Data Achieved Sample Size 3096 Available Data
- Cross-sectional
Sampling Procedure
Source Of Sampling Frame
Swedish total population register (TPR)
Sampling Design
- Probability
Data Collection
Start Date
03-2012
End Date
11-2012
Participation Mandatory
No
Type Of Data Source
Survey
Interview Mode
- 38 % CAPI
- 62 % CATI
Percentage Of Proxy Interviews
0 %
Weighting
Weighting: Method
"Weights were calculated by a calibration estimator. The estimator used the design weights given by the sampling design as starting weights. To adjust for non-response and improve accuracy the design weights were calibrated against known population totals. The variables used in the calibration were sex, age, level of education, region,
country of birth, legal marital status, employment status, income and degree of urbanization." (Eurostat (2014): Adult Education Survey 2011. EU Quality Report, p. 45)Notes
-
References
Eurostat: 2011 AES Quality Report SE.
Eurostat (2014): Adult Education Survey 2011. EU Quality Report. (Version October 2014). -
SI - Slovenia
National Reference
Corresponding National Study
-
Producer
Statistical Office of the Republic of Slovenia
Universe
Residents aged from 18 to 69 living in individual households who are randomly selected from the Central Population Register.
Target Sample Size
Cross-sectional Data Achieved Sample Size 4943 Available Data
- Cross-sectional
Sampling Procedure
Source Of Sampling Frame
Central Population Register (CPR)
Sampling Design
- Probability
- random
- stratified
- multi-stage
Secondary Sampling Units
Individuals
Stratification Criteria
"Stratification according to type of settlements (6 strata):
1. settlements with fewer than 2.000 inhabitants and with less than 30% of agricultural households;
2. settlements with fewer than 2.000 inhabitants and with at least 30% agricultural households;
3. settlements with 2.000 to 10.000 inhabitants;
4. settlements with 10.000 to 80.000 inhabitants;
5. Maribor (the second largest city in Slovenia with approx. 93.000 inhabitants);
6. Ljubljana (Slovenia’s capital with approx. 250.000 inhabitants)." (Eurostat: 2011 AES Quality Report SI)Sampling Method
"Within stratum 1063 sampling units were selected with the probability proportional to size (PPS with replacement) and then in each sampling unit 8 persons were selected." (Eurostat: 2011 AES Quality Report SI)
Data Collection
Start Date
09-2011
End Date
12-2011
Participation Mandatory
No
Type Of Data Source
Survey
Interview Mode
- 54.9 % CAPI
- 45.1 % CATI
Percentage Of Proxy Interviews
0 %
Weighting
Non-response Weight: Method
"Weights due to non-response were calculated according to strata. The weight due to non-response is inversely proportional to the response rate within the stratum. Correction due to non-response is equal to the product of the sampling weight and the non-response weight." (Eurostat: 2011 AES Quality Report SI)
Notes
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References
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SK - Slovakia
National Reference
Corresponding National Study
-
Producer
Statistical Office of the Slovak Republic
Universe
The target population of the population was the age group 18-64 years old, permanent residents.
Target Sample Size
Cross-sectional Data Achieved Sample Size 5000 Available Data
- Cross-sectional
Sampling Procedure
Source Of Sampling Frame
whole territory of the Slovak Republic
Sampling Design
- Probability
- random
- stratified
- multi-stage
Stratification Criteria
"Stratifying variables for the construction of strata was the region and the size group of municipality. On the basis of these stratifying variables 48 strata were created, which covered the whole territory of the Slovak Republic (8 administrative regions). The municipalities in the region were divided by their size into 7 groups" (Eurostat: 2011 AES Quality Report SK)
Sampling Method
stratificated 3-stage sampling: 1st stage: municipalities in strata, 2nd stage: dwelling households in selected municipalities, 3rd stage: persons 18 years old and over in selected dwelling household. (Eurostat: 2011 AES Quality Report SK)
Data Collection
Start Date
01-10-2011
End Date
15-11-2011
Participation Mandatory
No
Type Of Data Source
Survey
Interview Mode
- 100 % PAPI
Percentage Of Proxy Interviews
0 %
Weighting
Weighting: Method
"The design weighting took into account the (post)stratification for unit non-reponse." (Eurostat: 2011 AES Quality Report SK)
Notes
-
References
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UK - Great Britain
National Reference
Corresponding National Study
National Adult Learning Survey 2010
Producer
Ipsos MORI Social Research Institute, on behalf of the Department for Business, Innovation and Skills.
Universe
Eligible adults include (i) people aged 16-24 not in continuous full-time education and (ii) all adults aged 25 and over regardless of their current learning status.
Target Sample Size
Cross-sectional Data Achieved Sample Size 3524 Available Data
- Cross-sectional
Sampling Procedure
Source Of Sampling Frame
Postcode Address File
Sampling Design
- Probability
- random
- stratified
- multi-stage
Primary Sampling Units
Postecode sectors
Secondary Sampling Units
Individuals
Sampling Method
"The sample was drawn using a three-stage equal-probability design:
1. selection of postcode sectors, which were the Primary Sampling Units (PSUs), with probability proportionate to size (PPS)
2. systematic (random) selection of addresses within sampled PSUs
3. random selection of one respondent within each address/dwelling unit (DU) via a Kish grid." (Eurostat: 2011 AES Quality Report UK)Data Collection
Start Date
18-01-2010
End Date
01-08-2010
Participation Mandatory
Yes
Type Of Data Source
Survey
Interview Mode
- 100 % CAPI
Percentage Of Proxy Interviews
0 %
Weighting
Design Weight: Method
"[...] design weights adjusted for varying selection probabilities (where more than one address is identified at a selected/printed address and where an address contains more than one eligible person)" (Eurostat: 2011 AES Quality Report UK)
Non-response Weight: Method
"[...] non-response weights corrected for any non-response bias" (Eurostat: 2011 AES Quality Report UK)
Weighting: Method
"Final weights were calculated by multiplying these two weights together." (design weight & non-response weights) (Eurostat: 2011 AES Quality Report UK)
Notes
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References
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IT - Italy
National Reference
Corresponding National Study
-
Producer
Istat - National Institute of Statistics
Universe
Permanent residents aged 25-64 years. Optional age group 18 to 24 years old and 65 to 75 years old.
Target Sample Size
Cross-sectional Data Achieved Sample Size 11593 Available Data
- Cross-sectional
Sampling Procedure
Source Of Sampling Frame
Public Registry
Sampling Design
- Probability
- random
- stratified
- multi-stage
Primary Sampling Units
Municipality
Secondary Sampling Units
Households
Stratification Criteria
"Municipalities were stratified according to their demographic size and observing the following conditions:
• self-weighting of the sample at regional level;
• selection of a sample municipality within each stratum defined on the municipalities of the NAR group;
• choice of a minimum number of households to be interviewed in each sample municipality; for this survey, this number was set at 11;
Strata of municipalities were formed following the criterion of approximately constant size in terms of resident population."
(Eurostat: 2011 AES Quality Report IT)Sampling Method
"Municipalities are divided into two sub-groups on the basis of the resident population:
• The group of Self-Representative municipalities (which since now we‘ll referred as AR municipalities) made up of larger demographic size of municipalities;
• The group of Non Self Representative municipalities (or NAR) made up of the remaining municipalities.
In the group of AR municipalities, each municipality is considered as an independent stratum and a cluster selection scheme is used. The primary sampling units are the households registered in the Public Registry, selected systematically from the Public Register of the municipality itself. Within the group of NAR municipalities a two stage sampling design is adopted with stratification of the primary units. The Primary Units (UP) are the municipalities, the Secondary Units are the households registered in the Public Registry.
The municipalities are selected with probabilities proportional to their demographic size and without replacement, and the households are selected with probabilities that are equal and without replacement.
For each household included in the sample, the characteristics object of the survey are collected for all the actual components of the household."
(Eurostat: 2011 AES Quality Report IT)Data Collection
Start Date
21-09-2012
End Date
10-12-2012
Participation Mandatory
Yes
Type Of Data Source
Survey
Interview Mode
- 100 % Mixed Mode Collection
Percentage Of Proxy Interviews
19.5 %
Weighting
Weighting: Method
"The calibration estimator is used to obtain AES estimates. Grossing weights are determined as follows:
1. Firstly, design weights are obtained as the inverse of the inclusion probabilities of any household in the sample.
2. Then, correction factors for households non-response are worked out as the reciprocal of the response ratios (computed for territorial domains and municipality size). Intermediate weights corrected for non-response are then computed multiplying initial weights by these correction factors.
3. Finally, final weights are obtained solving a minimization problem under constraints. The function to be minimised is a distance between final and intermediate weights; the constraints regard the estimates of some auxiliary variables that have to be equal to the totals in the reference population derived by external sources (Population Census, LFS): main constraints are population by NUTS 1, gender and age groups; population by NUTS 1, gender and self-reported employment status; population by NUTS 1, gender and educational degree; Population by NUTS 1, gender and demographic size of the municipality.The sample reproduces the same distribution of the population according to the chosen auxiliary variables."
(Eurostat: 2011 AES Quality Report IT)Notes
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References
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MT - Malta
National Reference
Corresponding National Study
-
Producer
National Statistics Office (NSO)
Universe
The target population which was used for this survey comprised of individuals aged 25-64 residing in Malta and living in private households.
Target Sample Size
Cross-sectional Data Achieved Sample Size 2882 Available Data
- Cross-sectional
Sampling Procedure
Source Of Sampling Frame
2005 Census of Population and Housing
Sampling Design
- Probability
- random
- stratified
- one stage
Primary Sampling Units
Individuals
Secondary Sampling Units
Not used
Data Collection
Start Date
01-05-2012
End Date
31-07-2012
Participation Mandatory
Yes
Type Of Data Source
Survey
Interview Mode
- 100 % PAPI
Percentage Of Proxy Interviews
0 %
Weighting
Weighting: Method
"Two sets of weights were constructed in order to be used in AES to correct for any biases in the final sample due to sample design and differential response. The first set of weights - RESPWEIGHT; aligns and grosses sample estimates with population distribution in terms of individuals' gender, age and district. The scope of the second set of weight - NFEACTWEIGHT; is to cater for the random selection of the two non-formal activities. Calibration was then used in order to correct the estimates and to match them to demographic data." Eurostat: (2011 AES Quality Report MT)
Notes
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References
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PT - Portugal
National Reference
Corresponding National Study
-
Producer
Statistics Portugal
Universe
Target population: resident population aged between 18 to 69 years old (national questionnaire), aged between 25 to 64 years old (EU AES), living in dwellings of main residence in national territory.
Target Sample Size
Cross-sectional Data Achieved Sample Size 14189 Available Data
- Cross-sectional
Sampling Procedure
Source Of Sampling Frame
Master sample based on 2001 Census
Sampling Design
- Probability
- random
- stratified
- multi-stage
Primary Sampling Units
Area units
Secondary Sampling Units
Dwellings
Stratification Criteria
"The AES sample follows a Stratified Two-Stage Cluster design, where the strata are the NUTSII regions (PT11, PT16, PT17, PT18, PT15, PT20 and PT30), the primary sampling units are geographical areas of the Master Sample and the secondary sampling units (also the ultimate sampling units) are the private dwellings of usual residence. " (Eurostat: 2011 AES Quality Report PT)
Data Collection
Start Date
24-10-2011
End Date
13-02-2012
Participation Mandatory
No
Type Of Data Source
Survey
Interview Mode
- 100 % CAPI
Percentage Of Proxy Interviews
0 %
Weighting
Design Weight: Method
"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: 2011 AES Quality Report PT)
Non-response Weight: Method
"application of a correction factor for non-response to the weight calculated in the first step" (design weight) (Eurostat: 2011 AES Quality Report PT)
Coverage Adjustment Weight: Method
"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: 2011 AES Quality Report PT)
Notes
-
References
-
PL - Poland
National Reference
Corresponding National Study
-
Producer
Central Statistical Office, Poland
Universe
Permanent residents aged 25 to 64 years, coverage of the optional age groups 18 - 24 and 65 - 69 years old.
Target Sample Size
Cross-sectional Data Achieved Sample Size 27633 Available Data
- Cross-sectional
Sampling Procedure
Source Of Sampling Frame
Domestic Territorial Division Register
Sampling Design
- Probability
- random
- stratified
- multi-stage
Primary Sampling Units
Census enumeration units
Secondary Sampling Units
Dwellings
Stratification Criteria
"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: 2011 AES Quality Report PL)
Sampling Method
"PSUs were selected with the use of Hartley’a-Rao method. Before sampling, the PSUs were randomly sorted separately in each stratum. Then, 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: 2011 AES Quality Report PL)
Data Collection
Start Date
02-01-2012
End Date
29-02-2012
Participation Mandatory
No
Type Of Data Source
Survey
Interview Mode
- 100 % PAPI
Weighting
Weighting: Method
"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:
- sex x age groups,
- urban/rural areas x age groups,
- urban/rural areas x sex.
Calibrated weights were calculated with the use of the specially created program in the SAS system. The applied calibration procedure was analogous to the one applied in the EU-SIlC." (Eurostat: 2011 AES Quality Report PL)Notes
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References
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RS - Serbia
National Reference
Corresponding National Study
-
Producer
Statistical Office of the Republic of Serbia
Universe
Target population consist of more than one year Republic of Serbia residents, aged 25 to 64 years.
Target Sample Size
Cross-sectional Data Achieved Sample Size 4534 Available Data
- Cross-sectional
Sampling Procedure
Source Of Sampling Frame
2002 census data base
Sampling Design
- Probability
- random
- stratified
- multi-stage
Primary Sampling Units
Census enumeration units
Secondary Sampling Units
Households
Stratification Criteria
"Stratification of enumeration areas was done according to two criteria: territory of the 25 areas and type of settlement (urban and other). In that way 50 strata were formed. " (Eurostat: 2011 AES Quality Report RS)
Sampling Method
"Three stage stratified sample was used. The first stage units were enumeration areas, the second stage units households and the third stage units were individuals. [...] Enumeration areas were selected with probability proportional to size within each stratum from the list of enumeration areas. Size measure for each enumeration area was number of households according to Census 2002. Households and one person from household, were selected randomly with equal probabilities." (Eurostat: 2011 AES Quality Report RS)
Data Collection
Start Date
20-08-2011
End Date
31-12-2011
Participation Mandatory
No
Type Of Data Source
Survey
Interview Mode
- 54.8 % CAPI
- 45.2 % CATI
Percentage Of Proxy Interviews
0 %
Weighting
Weighting: Method
"Adjusting for the households and persons non-response and poststratification according to the population velues from vital statistics, according to the five year groups and gender at the national level. " (Eurostat: 2011 AES Quality Report RS)
Notes
-
References
-
CH - Switzerland
National Reference
Corresponding National Study
Mikrozenus Aus- und Weiterbildung 2011
Swiss Adult Education Survey 2011
Microrecensement formation de base et formation continue 2011
Microcensimento formazione di base e formazione continua 2011Producer
Swiss Federal Statistical Office
Universe
Permanent residents aged 15 to 74 years.
Target Sample Size
Cross-sectional Data Achieved Sample Size 9660 Available Data
- Cross-sectional
Sampling Procedure
Source Of Sampling Frame
SRPH (Stichprobenregister für Personen und Haushaltserhebungen)
Sampling Design
- Probability
- random
- stratified
- one stage
Primary Sampling Units
Individuals
Secondary Sampling Units
Not used
Stratification Criteria
stratified by cantons
Data Collection
Start Date
15-03-2011
End Date
17-12-2011
Participation Mandatory
No
Type Of Data Source
Survey
Interview Mode
- 100 % CATI
Percentage Of Proxy Interviews
2 %
Weighting
Weighting: Method
"The weighting was made so that our final sampling correspond to the swiss population of the same age. This weighting was calibrated on the sex, age, civil state, nationality and cantons. The stratification is based on the cantons." (Eurostat: 2011 AES Quality Report CH)
Notes
-
References
-
ES - Spain
National Reference
Corresponding National Study
-
Producer
National Statistical Institute of Spain
Universe
Individuals in the age of 18-64 years, residing in Spanish households.
Target Sample Size
Cross-sectional Data Achieved Sample Size 17829 Available Data
- Cross-sectional
Sampling Procedure
Source Of Sampling Frame
Official Population Register of Spain
Sampling Design
- Probability
- random
- stratified
- multi-stage
Primary Sampling Units
Municipality
Secondary Sampling Units
Individuals
Stratification Criteria
"PSUs stratified within NUTS2 depending on the size of municipality (up to seven strata per NUTS2)" (Eurostat: 2011 AES Quality Report ES)
Sampling Method
"PSU selected with probability proportional to size and FSU with equal probability." (Eurostat: 2011 AES Quality Report ES)
Data Collection
Start Date
10-2011
End Date
03-2012
Participation Mandatory
Yes
Type Of Data Source
Survey
Interview Mode
- 95.5 % CAPI
- 3.8 % CATI
- 0.7 % Mixed Mode Collection
Percentage Of Proxy Interviews
0.3 %
Weighting
Design Weight: Method
"calculation of design weights that are the inverse of the probability of selection" (Eurostat: 2011 AES Quality Report ES)
Non-response Weight: Method
"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)Coverage Adjustment Weight: Method
"benchmark to sex and group of ages, nationality and population of NUTS3 (within NUTS2)" (Eurostat: 2011 AES Quality Report ES)
Notes
-
References
-
NL - Netherlands
National Reference
Corresponding National Study
-
Producer
Statistics Netherlands
Universe
Permanent residents aged between 25 and 64 years.
Target Sample Size
Cross-sectional Data Achieved Sample Size 3036 Available Data
- Cross-sectional
Sampling Procedure
Source Of Sampling Frame
Municipal basic registration of population
Sampling Design
- Probability
- random
- stratified
- multi-stage
Primary Sampling Units
Municipality
Secondary Sampling Units
Individuals
Stratification Criteria
"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: 2011 AES Quality Report NL)
Sampling Method
"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: 2011 AES Quality Report NL)
Data Collection
Start Date
01-01-2012
End Date
31-03-2012
Participation Mandatory
No
Type Of Data Source
Survey
Interview Mode
- 100 % CATI
Percentage Of Proxy Interviews
0 %
Weighting
Weighting: Method
"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: 2011 AES Quality Report NL)Notes
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References
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EE - Estonia
National Reference
Corresponding National Study
-
Producer
Statistics Estonia
Universe
The target population for the national survey were individuals who were 20-64 years old for the beginning of the survey year and whose address in the Population Register was precise enough to find the person.
Target Sample Size
Cross-sectional Data Achieved Sample Size 3324 Available Data
- Cross-sectional
Sampling Procedure
Source Of Sampling Frame
Population Register
Sampling Design
- Probability
- systematic
- stratified
- one stage
Primary Sampling Units
Individuals
Secondary Sampling Units
Not used
Stratification Criteria
Stratification is made by age and gender.
Data Collection
Start Date
17-10-2011
End Date
16-01-2012
Participation Mandatory
No
Type Of Data Source
Survey
Interview Mode
- 40.3 % CAPI
- 59.7 % CATI
Percentage Of Proxy Interviews
0 %
Weighting
Design Weight: Method
"Design weight depends on the different inclusion probability due to stratification. Design weight is inverse of the inclusion probability." (Eurostat: 2011 AES Quality Report EE)
Non-response Weight: Method
"Design weights are corrected according to different response probabilities. Individuals are divided into 7 response homogenity group according to place of residence (county and urban/rural). Correction factors are calculated for each RHG as the weighted sum of all eligible individuals divided by weighted sum of responded individuals." (Eurostat: 2011 AES Quality Report EE)
Coverage Adjustment Weight: Method
"Calibration of non-response corrected weights according to demographic data. Variables for calibration are sex and 5-year age group, place of residence. Software package Bascula is used for calibration." (Eurostat: 2011 AES Quality Report EE)
Notes
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References
-
EL - Greece
National Reference
Corresponding National Study
-
Producer
Hellenic Statistical Authority
Universe
Persons aged 18 - 64 years, residing in private households, and staying (or intend to stay) at least 1 year in Greece.
Target Sample Size
Cross-sectional Data Achieved Sample Size 6040 Available Data
- Cross-sectional
Sampling Procedure
Source Of Sampling Frame
2001 census
Sampling Design
- Probability
- systematic
- stratified
- multi-stage
Primary Sampling Units
Dwelling blocks
Secondary Sampling Units
Dwellings
Stratification Criteria
"Prior to sampling, country is stratified by NUT III and degree of urbanization (except Athens and Thessaloniki agglomerations that are divided in 31 and 9 (respectively) strata, depending in socioeconomic criteria). The total number of final strata is 182." (Eurostat: 2011 AES Quality Report EL)
Sampling Method
"A sub-sample of Labour Force Survey was used fot the AES, ans consequently, AES follows the same sampling scheem as LFS, which is a two stage stratified sample survey. At the first sampling stage, 2640 clusters (groups of dwellings) are selected with probability proportional to their “size” (that is, proportional to the number of households residing in these areas at 2001 census).At the second sampling stage a systematic sample of dwellings is selected in every primary sampling unit. All households residing in selected dwellings are asked to participate in the survey. All the individuals who are members of the selected households are interviewed." (Eurostat: 2011 AES Quality Report EL)
Data Collection
Start Date
06-2012
End Date
12-2012
Participation Mandatory
No
Type Of Data Source
Survey
Interview Mode
- 100 % PAPI
Percentage Of Proxy Interviews
40.6 %
Weighting
Weighting: Method
"Persons in the sample were weighted by the design weights (inverse of the estimated probabilities of selection for each household). Using these weights, estimates for certain combinations of gender and age and NUTS2 areas are computed, and a post-stratification factor is computed to ensure that the estimated - form AES - totals for the particular combinations of gender, age and NUTS2 areas are equal to the estmated "true" values for each combination." (Eurostat: 2011 AES Quality Report EL)
Notes
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References