National Statistical Institute
|Contact organisation unit|
Labour market Statistics
|Contact person function|
|Contact mail address|
2, P.Volov str., Sofia 1038
|Contact email address|
|Contact phone number|
(+359 2) 9857 132
|Contact fax number|
|Metadata last certified||12 July 2021|
|Metadata last posted||12 July 2021|
|Metadata last update||12 July 2021|
Main results from the Labour force survey ad-hoc module on accidents at work and other work-related health problems.
The Labour Force Survey is a sample statistical survey carried out through households. The main purpose of the survey is to provide data on labour status of population aged 15 years and over and for the main characteristics of employed, unemployed and persons out of labour force in the Republic of Bulgaria. In 2020 an ad-hoc module on accidents at work and other work-related health problems was incorporated in the regular Labour force survey.
The classifications applied in the Labour force survey are harmonised with the international classifications in terms of economic activities, occupations, educational attainment. The main classifications used are the following:
All persons aged 15 years and over living in the selected non-institutional households are covered by the Labour force survey. The target population for the ad-hoc module "Accidents at work and other work-related health problems" consists of persons aged 15 years and over who have worked during the reference week and of persons aged 15 - 74 who have worked in the past but were not employed during the reference week.
|Statistical concepts and definitions|
The Labour Force Survey provides estimates of the main characteristics of labour market as employment, unemployment, inactivity, occupations, economic activities, working time and other, as well as social-demographic characteristics as sex, age, place of residence (urban/rural), education etc.
The main definitions applied in the survey are in accordance with the recommendation of International Labour Organisation and EU legislation.
The results from the ad-hoc module "Accidents at work and other work-related health problems" allows to estimate:
the socio-demographic and labour market characteristics of persons affected.
Total population usually residing in Bulgaria, except persons living in collective households. The ad-hoc module "Accidents at work and other work-related health problems" refers to population of persons aged 15 years and over who have worked during the reference week and of persons aged 15 - 74 who have worked in the past but were not employed during the reference week.
The whole territory of Republic of Bulgaria.
|Unit of measure|
Number of persons is presented in thousands.
For every person in the sample the reference period is one calendar week (from Monday to Sunday). The sample is evenly spread over the all 13 calendar weeks within each quarter. The reference period for the ad-hoc module is 12 calendar months preceding the LFS survey.
|Legal acts and other agreements|
The concepts and definitions applied in the Labour Force Survey are in line with:
|Confidentiality - policy|
|Confidentiality - data treatment|
Individual anonymous data provided for the purposes of scientific research do not consist any administrative data as personal information and address and do not allow direct identification. Additional aggregation of data is performed for some of the variables.
In accordance with Article 25 of the Law on Statistics Individual data are not published. Dissemination of individual data is possible only in accordance with Article 26 of the Law on Statistics.
The main results from the LFS ad-hoc module on accidents at work and other work-related health problems are disseminated on the NSI website on 16 July 2021.
|Release calendar access|
The calendar is available on the NSI website:
Accessibility of all users to statistical data and equality of their rights are stipulated in the Regulation for dissemination of statistical products and services by the National Statistical Institute. Data are disseminated on the NSI website, section "Labour Market" in line with the Law of Statistics and European Statistics Code of Practice respecting professional independence and in an objective, professional and transparent manner in which all users are treated equitably.
|Frequency of dissemination|
|Accessibility and clarity|
The main results from the ad-hoc module "Accidents at work and other work-related health problems" are available for all users at the NSI website section “Labour Market”, Labour Force Survey: https://www.nsi.bg/
Individual anonymous micro-data could be provided for scientific research purposes by individual request according to the Regulation of submission of anonymous individual data for scientific and research purposes.
An information service could be provided by request, according to the Rules for Dissemination of Statistical Information Products and Services.
|Documentation on methodology|
Ensuring the quality of Labour Force Survey and its modules is according to the policy and Quality Management Programme of NSI. NSI follows the Action plan for implementation of Recommendation of Eurostat Task Force for quality improvement of Labour Force Survey.
Quality report on the Labour Force Survey is prepared each year. Quality report on the 2020 ad-hoc module on accidents at work and other work-related health problems is also prepared in line with Eurostat requirements.
The main users of LFS statistical data are:
- European Commission - DG Employment and other Directorates
- Eurostat - Labour Market unit and other units
- European Central Bank
- International Labour Organisation
- Ministries and State agencies
- Bulgarian National Bank
- Trade Unions
- Employers’ organisations
- Non-governmental organisations
- Research institutions
Companies, agencies - for own marketing researches and consultancy activities.
The ad-hoc module "Accidents at work and other work-related health problems" covers all compulsory variables according Commission Implementing Regulation (EU) 2018/1709 of 13 November 2018 specifying the technical characteristics of the 2020 ad hoc module on accidents at work and other work-related health problems as regards the labour force sample survey pursuant to Council Regulation (EC) No 577/98 (Text with EEA relevance.)
|Accuracy and reliability|
The sample used for the Labour Force Survey is a two-stage stratified cluster sample which includes quarterly about 19.5 thousand households (representing about 0.65% sampling rate). The ad-hoc module on accidents at work and other work-related health problems carried out over a part (25%) of LFS sample in each quarter and consisted of the households from the third wave. Due to the sampling approach used in the labour force survey, the estimation of the parameters obtained from the labour force survey could vary from those in the population due to sampling errors, errors due to non-response, errors in registration or processing etc.
Coefficients of variation (relative standard errors), and confidence intervals (i.e. the range of values that 95% of times would capture the true value in the population) are calculated for assessment of stochastic reliability of the estimates for main indicators.
The non-response rate for the ad-hoc module “Accidents at work and other work-related health problems” is 1.0% (from persons responded in regular LFS).
|Timeliness and punctuality|
The main results from the LFS ad-hoc modules are published about 6 months after the reference year.
The main results from the ad-hoc module "Accidents at work and other work-related health problems" are presented on 16 July 2021.
|Coherence and comparability|
|Comparability - geographical|
Comparability across EU Member States is considered high due to use of harmonised concepts, variables, definitions and classifications.
|Comparability - over time|
|Coherence - cross domain|
|Coherence - internal|
Some of the totals (rows and columns) in tables could slightly differ from the sum of the components because of the rounding of figures.
|Cost and burden|
The average duration of interview on the ad-hoc module is about 10 minutes.
|Data revision - policy|
Revisions of previously released data are usually not performed. By exception, revisions may happen after new estimates of population from a population census became available.
|Data revision - practice|
Not applied for the 2020 ad-hoc module.
Ad-hoc module integrated with the Labour force survey.
|Frequency of data collection|
Data for the ad-hoc module "Accidents at work and other work-related health problems" are collected using a paper questionnaire by conducting a personal interview with persons from the selected households immediately after the interview on the main labour force survey.
Plausibility checks are performed during the data entry. Additional consistency checks are carried out before publishing of data.
The completed questionnaires are coded (for economic activity, occupation, place of work, field of education etc.) and entered into computer in NSI regional offices. Data files are sent to NSI, where additional control and weighting is doing. Data are aggregated by different variables (characteristics), tabulated and disseminated.
Download in SDMX 2.1 file format: Accidents at work and work-related health problems - Ad hoc module to the labour force survey in 2020
Metadata Structure Definition in SDMX 2.1: ESMS_MSD+BNSI+2.0+SDMX.2.1.xml
Download in SDMX 2.0 file format: Accidents at work and work-related health problems - Ad hoc module to the labour force survey in 2020
Metadata Structure Definition in SDMX 2.0: ESMS_MSD+BNSI+2.0+SDMX.2.0.xml