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National reference metadata

Serbia

Reference metadata describe statistical concepts and methodologies used for the collection and generation of data. They provide information on data quality and, since they are strongly content-oriented, assist users in interpreting the data. Reference metadata, unlike structural metadata, can be decoupled from the data.

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Employment and unemployment (Labour force survey) (employ)

National Reference Metadata in ESS Standard for Quality Reports Structure (ESQRS)

Compiling agency: Statistical Office of the Republic of Serbia

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Coverage   
Coverage Household concept Definition of household for the LFS Inclusion/exclusion criteria for members of the household Questions relating to employment status are put to all persons aged ...
 Labor Force Survey   Housekeeping  Under the term household we anticipate: a) any family or other community of persons who declare to live together and jointly spend their  income  for basic living support (costs of housing,  food, etc.), regardless the  fact whether in the  time   of interview all the members appear in the place where the household is situated; b) every person who lives on his / her own (single-person household) and is not member of any other household in some other place, a person living in a separate or divided dwelling, or as a tenant, regardless whether he/she lives in the same room with another tenant or with the members of the lessor’s household; however this  person does not  spend  income  jointly with them but  only pays for the housing.  Excluded are persons in institutional households (students’  homes,  homes  for  children  and young people with developmental disability, homes for socially imperiled children, old / retired people homes, homes for adults with disability, monasteries, nunneries, etc.). For the temporary absent persons (less than 1 year) data are obtained from other family member. Persons absent more than one year are excluded, except in a case when they considerably contribute to the income of the household and do not have other family in the place where they live. For students  who  live  in other town/village within country data are obtained from original households in the case when they are economically dependent from that household.  15 - 89 years

 

Population concept  Specific population subgroups
Primary/secondary students Tertiary students People working out of family home for an extended period for the purpose of work People working away from family home but returning for weekends Children alternating two places of residence
 Usual residence (12 months)  Family home  Family home (if economically dependent otherwise term address)  Family home if they considerably contribute to the income of the household and do not have another family, otherwise term address.  Family home  Most of the time

 

Reference week
Fixed week (data collection refers to one reference week, to which the observation unit has been assigned prior to the fieldwork) Rolling week (data collection always refers to the week before the interview)                                  

 

 
In 2022, each week in a year is regarded as referent week, where referent weeks are fixed. Period of interview last two weeks after referent week.
The period of observation for the first quarter included 13 referent weeks and lasted from  January 3, 2022 to April 3, 2022.
For the second quarter the period of observation included 13 referent weeks – from  April 4, 2022  to  July 3, 2022.
For the third quarter the period of observation included 13 referent weeks – from  July 4, 2022  to October 2, 2022.
For the fourth quarter the period of observation included 13 referent weeks – from October 3, 2022 to January 1, 2023.              

 

 

 

 

 

 

 

 
Participation is voluntary/compulsory?
 According to the law it is compulsory.
Not Applicable

[not requested for the LFS quality report]

[not requested for the LFS quality report]

[not requested for the LFS quality report]

[not requested for the LFS quality report]

Not Applicable

[not requested for the LFS quality report]

Not Applicable

[not requested for the LFS quality report]

Sampling design & procedure
Sampling design (scheme; simple random sample, two stage stratified sample, etc.) Base used for the sample (sampling frame)  Last update of the sampling frame (continuously updated or date of the last update) Primary sampling unit (PSU)   Final sampling unit (FSU) Date of sample selection
 The sample is based on a two-stage stratified rotation panel design.  Population Census 2011  2011  Primary sampling units (PSUs) are enumeration districts.  Final sampling units are households.  One month that preceding the quarter in which is the survey

 

Sampling design & procedure
First (and intermediate) stage sampling method   Final stage sampling method Stratification (variable used) Number of strata (if strata change quarterly, refer to Q4). Rotation scheme (2-2-2, 5, 6, etc.)
 Primary sampling units (enumeration districts), are selected  systematically with probability proportional to  size  (PPS) within each stratum (territory and settlement type) from EDs list. Size measure for each ED was number  of persons,  age  15 and more. EDs were sorted within each stratum according to the municipality and serial numbers. Using systematic selection on the sorted list, high level of implicit geographical stratification and effective sample distribution were provided  Final stage units - households were randomly selected, from household list, obtained for each ED.  Enumeration districts (PSUs) for each rotation group are stratified  according to the type of settlement (urban and other) and 25 areas (NUTS3 level).  UNA  Sample for each quarter consists of 4 rotation groups (sub-samples), with 2- 2-2 rotation scheme. The overlap between two consecutive quarters is 50%.

 

Yearly sample size & Sampling rate
Overall theoretical yearly sampling rate Size of the theoretical yearly sample
(i.e. including non-response) (i.e. including non-response)
 3.3  76960

  

Quarterly sample size & Sampling rate

Overall theoretical quarterly sampling rate

Size of the theoretical quarterly sample

(i.e. including non-response)

(i.e. including non-response)

 0.8

 19240

 

Use of subsamples to survey structural variables (wave approach)
Only for countries using a subsample for yearly variables
Wave(s) for the subsample  Are the 30 totals for ILO labour status (employment, unemployment and inactivity) by sex (males and females) and age groups (15-24, 25-34, 35-44, 45-54, 55+) between the annual average of quarterly estimates and the yearly estimates from the subsample all consistent? (Ref.: Commission Reg. 2019/2240) (Y/N) If not please list deviations List of yearly variables for which the wave approach is used (Ref.: Commission Reg. 2019/2240, Annex I)
 NA  NA  NA  NA

 

 

Brief description of the method of calculating the quarterly core weights Is the sample population in private households expanded to the reference population in private households? (Y/N) If No, please explain which population is used as reference population Gender is used in weighting (Y/N) Which age groups are used in the weighting (e.g., 0-14, 15-19, ..., 70-74, 75+)? Which regional breakdown is used in the weighting (e.g. NUTS 3)? Other weighting dimensions
 Initial weight for household is equal to inverse of inclusion probability (this inclusion probability is a product of inclusion probabilities from each stage), and correction for non-response. In order to obtain estimates for population that corresponds to current demographics projections, calibration procedure is performed, relating to the distribution of population according to sex, age (five-year age groups), at the level of territory (level NUTS 3) and  distribution of  households according to number  of  household  members (six groups),  at the  level of  territory,  provided that a household and each person from the relevant household have the same final weigh. Beside population in private households reference population also includes population in   collective households. 

0-14, 15-19,

..., 70-74, 75+ 
NUTS 3  number of household members 1,2,…,6+ 

 

Brief description of the method of calculating the yearly weights (please indicate if subsampling is applied to survey yearly variables) Gender is used in weighting (Y/N) Which age groups are used in the weighting (e.g., 0-14, 15-19, ..., 70-74, 75+)? Which regional breakdown is used in the weighting (e.g. NUTS 3)? Other weighting dimensions
 Yearly weights are calculated as an average of quarterly weights.        

 

Brief description of the method of calculating the weights for households External reference for number of households etc.? Which factors at household level are used in the weighting (number of households, household size, household composition, etc.) Which factors at individual level are used in the weighting (gender, age, regional breakdown etc.) Identical household weights for all household members? (Y/N)
 

Calibration procedure is performed to provide that a household and each person from the relevant household have the same  final weight.

 Y  Number of households by size  Gender, age, NUTS 3 level  Y
Not Applicable
Restricted from publication

Divergence of national concepts from European concepts

(European concept or National proxy concept used) List all concepts where any divergences can be found

   
Is there a divergence between the national and European concepts for the following characteristics? (Y/N) Give a description of difference and provide an assessment of the impact of the divergence on the statistics
Definition of resident population (*)  N  N/A
Identification of the main job (*)  N  N/A
Employment  N  N/A
Unemployment  N  N/A
Changes at CONCEPT level introduced during the reference year and affecting comparability with previous reference periods (including breaks in series)
Changes in (Y/N) Description of the impact of the changes Statistics also revised backwards (if Y: year / N) Variables affected Break in series to be flagged (if Y: year and quarter/N)  
concepts and definition  N        
coverage (i.e. target population)  N
       
legislation  N
       
classifications  N
       
geographical boundaries  N
       

 

Changes at MEASUREMENT level introduced during the reference year and affecting comparability with previous reference periods (including breaks in series)
Changes to (Y/N) Description of the impact of the changes Statistics also revised backwards (if Y: year / N) Variables affected Break in series to be flagged (if Y: year and quarter/N)
sampling frame  N        
sample design  N        
rotation pattern  N        
questionnaire  Y  Six missing variables from reguilation were added in the third quarter of 2022.  For the first and second quarter of 2022 answers were imputed for these six variables for the rotational groups which repeated in the third and the fourth quarter of 2022 based on replies from these quarters (third and fourth). For the 2021 year there were no imputations for these variables.  MIGREAS, SIZEFIRM, WAYFOUN, SHIFTWK, CONTRHRS, HWWISH   Q3 2023
instruction to interviewers  Y  New variables were explained to the interviewers.  N    
survey mode  N        
weighting scheme  N        
use of auxiliary information  N