Labour Force Survey 2011
Sri Lanka, 2011
Reference ID
LKA_2011_LFS_v01_M
Producer(s)
Department of Census and Statistics
Created on
Dec 22, 2014
Last modified
Mar 29, 2019
Page views
18017
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Identification
Survey ID Number
LKA_2011_LFS_v01_M
Title
Labour Force Survey 2011
Country
| Name | Country code |
|---|---|
| Sri Lanka | LKA |
Study type
Labor Force Survey [hh/lfs]
Series Information
Sri Lanka Labour Force Survey (LFS) was designed to measure the levels and trends of employment, unemployment and labour force in Sri Lanka. Since 1990, the survey is being conducted quarterly. 2011 is the twenty first successive year in which the survey has been repeated. Amongst other figures, Provincial level estimates are taken from the Annual LFS 2011 data file which is a combination of all the four quarterly files processed for the year 2011.
Abstract
The employment/unemployment data are required at very short intervals to monitor the program made in the employment generating policies of the government. To satisfy this need, Sri Lanka Labour Force Survey was designed as a quarterly basis survey to measure the levels and trends of employment, unemployment and labour force in Sri Lanka. Thus the survey is repeated four times each year since the first quarter of 1990.
Key objectives of the survey
- To study the economically active / inactive population
- To analyze employment by major industry group and employment status
- To determine unemployment rates by level of education and by age group
- To study the informal sector employment
- To determine the underemployment rates by sector and by major industries
Key objectives of the survey
- To study the economically active / inactive population
- To analyze employment by major industry group and employment status
- To determine unemployment rates by level of education and by age group
- To study the informal sector employment
- To determine the underemployment rates by sector and by major industries
Kind of Data
Sample survey data [ssd]
Unit of Analysis
Individuals from the population aged 10 years or more
Version
Version Description
v1.0: Full edited dataset, original version for internal DPD use.
Version Date
2013-08-27
Scope
Notes
The scope of LFS 2011 includes the following key sections :
1. Identification Information
2. Control Data
3. Personal Information
4. Information on Labour Force Identification and Personal Information are as follows:-
Identification Information - Address, Province, District, D.S. Division, G. N. Division, Sector, Name of MC/UC/PS - Name of Ward/Village/Estate, Census Block Number, Sample Reference Number - Survey Quarter, Number of households, Name of the Head of the household - Identifications of Interviewers & Supervising Officers Personal Information - Relationship to Head of Household, Gender, Age, Ethnic Group, Religion, Marital Status - Educational Attainment, Attendance at Schooling or other Educational Institution - Professional / Technical Training, Persons who are working abroad
1. Identification Information
2. Control Data
3. Personal Information
4. Information on Labour Force Identification and Personal Information are as follows:-
Identification Information - Address, Province, District, D.S. Division, G. N. Division, Sector, Name of MC/UC/PS - Name of Ward/Village/Estate, Census Block Number, Sample Reference Number - Survey Quarter, Number of households, Name of the Head of the household - Identifications of Interviewers & Supervising Officers Personal Information - Relationship to Head of Household, Gender, Age, Ethnic Group, Religion, Marital Status - Educational Attainment, Attendance at Schooling or other Educational Institution - Professional / Technical Training, Persons who are working abroad
Topics
| Topic | Vocabulary | URI |
|---|---|---|
| Labour and Employment [3] | CESSDA | Link |
Coverage
Geographic Coverage
National coverage [Excluding the Northern and the Eastern Provinces]. This survey covered persons living in housing units only and it excludes the institutional population.
Geographic Unit
District
Universe
Working age population (10 years and above) living in the non-institutional households in Sri Lanka
Producers and sponsors
Primary investigators
| Name | Affiliation |
|---|---|
| Department of Census and Statistics | Ministry of Finance and Planning |
Sampling
Sampling Procedure
Sampling plan and the sampling frame
Two stage stratified sampling procedure is adopted to select a sample of 17,620 housing units to be enumerated at the survey. The master sampling frame prepared for 2001 - Census of Population and Housing is used as the sampling frame for the sample selection of LFS in 2011. This main frame was updated after the Tsunami incident in 2007 using quick count method.
Sample size
At the beginning the sample size was 2,000 housing units per quarter in areas other than North and East, and the sample size was increased to 4,000 housing units per quarter in 1996 and continued thereafter. However, in 1992 and 1997, an annual sample of 20,000 housing units was selected to give reliable estimates by district level. In 2004 again 20,000 housing units were selected for the survey. However, in order to provide district level estimates precisely, it was decided to use 20,000 - 25,000 housing units as the annual sample from 2006. As such, in 2011, the annual sample of 17,620 housing units were selected.
Sample Allocation
In 2011, 1,762 Primary sampling Units (PSU's) are allocated to each district and to each sector by using the Neymann allocation method which considers the variance of unemployment rate as usually. The allocated sample for each district then equally distributed among 9 months. Table 2.1 on page 3 of the LFS Annual Report 2011 gives the sample distributions by district for year 2011.
Selection of Primary Sampling Units (PSU)
Primary sampling units are the census blocks prepared at the Census of Population and Housing - 2001. The sample frame, which was updated after Tsunami has been used for the selection of primary sampling units.
Selection of Secondary Sampling Units (SSU)
Secondary Sampling Units are the housing units in the selected 1,762 primary sampling units (census blocks). From each selected primary sampling unit 10 housing units (SSU) are selected for the survey using random sampling method.
Two stage stratified sampling procedure is adopted to select a sample of 17,620 housing units to be enumerated at the survey. The master sampling frame prepared for 2001 - Census of Population and Housing is used as the sampling frame for the sample selection of LFS in 2011. This main frame was updated after the Tsunami incident in 2007 using quick count method.
Sample size
At the beginning the sample size was 2,000 housing units per quarter in areas other than North and East, and the sample size was increased to 4,000 housing units per quarter in 1996 and continued thereafter. However, in 1992 and 1997, an annual sample of 20,000 housing units was selected to give reliable estimates by district level. In 2004 again 20,000 housing units were selected for the survey. However, in order to provide district level estimates precisely, it was decided to use 20,000 - 25,000 housing units as the annual sample from 2006. As such, in 2011, the annual sample of 17,620 housing units were selected.
Sample Allocation
In 2011, 1,762 Primary sampling Units (PSU's) are allocated to each district and to each sector by using the Neymann allocation method which considers the variance of unemployment rate as usually. The allocated sample for each district then equally distributed among 9 months. Table 2.1 on page 3 of the LFS Annual Report 2011 gives the sample distributions by district for year 2011.
Selection of Primary Sampling Units (PSU)
Primary sampling units are the census blocks prepared at the Census of Population and Housing - 2001. The sample frame, which was updated after Tsunami has been used for the selection of primary sampling units.
Selection of Secondary Sampling Units (SSU)
Secondary Sampling Units are the housing units in the selected 1,762 primary sampling units (census blocks). From each selected primary sampling unit 10 housing units (SSU) are selected for the survey using random sampling method.
Deviations from the Sample Design
In 2009, the field work of the survey for the year 2011 was done in all twelve months in 2011.Even though it was planned to conduct the labour force survey in Northern and Eastern provinces, the survey could not be conducted properly in Northern province due to the prevailing conditions. In year 2011 the survey was carried out in Eastern province successfully as in 2009.Therefore, this report is based on an annual sample of 20,250 housing units, excluding only Northern province provoding national, provincial and district level estimates with a stipulated standard errors of labour force characteristics as reported in the relevant reference periods of each 12 months of the year 2011. This survey covers persons living in housing units only and, it excludes the institutional population.
Data Collection
Dates of Data Collection
| Start | End |
|---|---|
| 2011-01-01 | 2011-01-31 |
Data Collection Mode
Face-to-face [f2f]
Supervision
Regular field supervisions were carried out throughout the year to check the concepts and definitions are being used by the enumerator accurately.
Data Collection Notes
The field work of the survey for the year 2011 was done in 9 months from January to October 2011. Listing operation was also staggered over a period of 9 months starting from November 2010 to August 2011. For each primary sampling unit, updating was done, about two months prior to the scheduled interviewing. As such, for example, the census blocks which were surveyed in January, were updated in November.
Statistical officers of the DCS were involved in the listing operation prior to the survey and also in the survey data collection operation. Each statistical officer is responsible to carry out all statistical activities in a Divisional Secretariat to which she/he is attached. These officers were given training before they were entrusted with the survey operations. A Deputy Director/Senior Statistician/Statistician is attached to each District Secretariat as the in charge of statistical activities in that district
Statistical officers of the DCS were involved in the listing operation prior to the survey and also in the survey data collection operation. Each statistical officer is responsible to carry out all statistical activities in a Divisional Secretariat to which she/he is attached. These officers were given training before they were entrusted with the survey operations. A Deputy Director/Senior Statistician/Statistician is attached to each District Secretariat as the in charge of statistical activities in that district
Data Collectors
| Name | Abbreviation | Affiliation |
|---|---|---|
| Department of Census and Statistics | DCS | Ministry of Finance and Planning |
Questionnaires
Questionnaires
Survey Schedule Current survey concepts and methods are very similar to those introduced at the beginning of the survey in 1990. However, some changes have been made over the years to improve the accuracy and usefulness of the data. Beginning in January 2006, some significant improvements were made to the labour force survey schedule in order to fulfill the requirements of it's users and also to provide additional information for the planning purposes. This was done after carefully reviewing of the LFS schedule with the technical assistance provided by the Economic and Social Commission for Asia and the Pacific (ESCAP) Adviser. The revision was made focusing on literacy, household economic activities, informal sector employment and underemployment etc. This revised version of the questionnaire has been using since first quarter, 2006.
Data Processing
Other Processing
Data was processed by district -wise batches and stored in seperate files. Data processing included the following steps.
1. Counting and accepting the filled questionnairs by the DP Division
2. Do a visual check for completeness
3. Preliminary editing and marking codes
4. Entry of data
5. Run edit program for each District batch
6. Produce error report and return to the Survey office
7. Correction of errors on the report
8. Change incorrect data using the corrected error report
9. Re-run the edit program and repeat the error correction procedure
10. Produce final report on clean data with a backup of clean data. After all baches are processed, all data files were combined together and then the following steps are completed for all data files:
11) Re-coding of variables needed for analysis
12) Adding of sample weights
13) Tabulations
1. Counting and accepting the filled questionnairs by the DP Division
2. Do a visual check for completeness
3. Preliminary editing and marking codes
4. Entry of data
5. Run edit program for each District batch
6. Produce error report and return to the Survey office
7. Correction of errors on the report
8. Change incorrect data using the corrected error report
9. Re-run the edit program and repeat the error correction procedure
10. Produce final report on clean data with a backup of clean data. After all baches are processed, all data files were combined together and then the following steps are completed for all data files:
11) Re-coding of variables needed for analysis
12) Adding of sample weights
13) Tabulations
Data Appraisal
Estimates of Sampling Error
The estimation procedure is given in the section 2.6 in the Annual Report. The Annual Report is attched in the External Resources Section.
Data Appraisal
The adjustments for non-response is given in the section 2.7 in the Annual Report. The Annual Report is attched in the External Resources Section.
Access policy
Contacts
| Name | Affiliation | URL | |
|---|---|---|---|
| Information Unit | Department of Census & Statistics | information@statistics.gov.lk | http//:www.statistics.gov.lk |
| Sample Survey Division | Department of Census & Statistics | sample.survey@statistics.gov.lk | http//:www.statistics.gov.lk |
Confidentiality
Under the Statistical ordinance, micro data cannot be released with identifications for public use. Procedures are in place to ensure that information relating to any particular individual person, household or undertaking will be kept strictly confidential and will not be divulged to external parties. Information on individual or individual Household/establishment will not be divulged or published in such a form that will facilitate the identification of any particular person or establishment as the data have been collected under the Census/Statistical ordinance, according to which the information at individual level cannot be divulged and such information is strictly confidential.
The following rules apply to micro data released by the Department of Census and Statistics.
• Only the requests of Government Institutions, Recognized Universities, Students, and selected international agencies are entertained. However, the Data users are required to strictly adhere to
the terms stipulated in the agreement form.
• All the data requests should be made to Director General (DG) of the DCS as the sole authority of releasing data is vested with the DG, DCS. DCS of Sri Lanka reserves sole right to approve or reject any data request made depending on the confidential nature of the data set and intended purpose of the study or analysis.
• Requests for micro data should be made through the agreement form designed by DCS for this purpose (Form D.R.1). The agreement form should be filled in triplicate and the Study/project proposal should accompany the filled agreement form. If requests are made for the micro data of more than one survey, a separate agreement should be signed.
• If the data request is from a student a letter from the respective Dept. Head/Dean/Supervisor, recommending the issue of data, should also be accompanied.
• If the request is approved only 25% of the data file is released at the first stage. The release of the total data file is considered only after reviewing the draft report prepared on the basis of the 25% sample data file.
• The released Data file should be used only for the specific study/Analysis mentioned in the agreement form and shall not be used for any other purpose without the prior approval of the Director General of the DCS. Moreover, Copies of the micro-data file, obtained from the DCS, shall not be given to anyone else without the prior written approval of the Director General of the DCS.
• The draft report of the Study/Analysis should be submitted to the DCS and the concurrence of the DG, DCS, should be obtained before publishing it. Once published, a copy of the final report should be submitted to the DCS.
Access conditions
The dataset has been anonymized and is available as a Public Use Dataset. It is accessible to all for statistical and research purposes only, under the following terms and conditions:
1. The data and other materials will not be redistributed or sold to other individuals, institutions, or organizations without the written agreement.
2. The data will be used for statistical and scientific research purposes only. They will be used solely for reporting of aggregated information, and not for investigation of specific individuals or organizations.
3. No attempt will be made to re-identify respondents, and no use will be made of the identity of any person or establishment discovered inadvertently.
4. No attempt will be made to produce links among datasets provided by the Department or among data from the Department and other datasets that could identify individuals or organizations.
5. Any books, articles, conference papers, theses, dissertations, reports, or other publications that employ data obtained from the Department will cite the source of data in accordance with the Citation Requirement provided with each dataset.
6. An electronic copy of all reports and publications based on the requested data will be sent to the Department
[Department : The Department of Census and Statistics]
1. The data and other materials will not be redistributed or sold to other individuals, institutions, or organizations without the written agreement.
2. The data will be used for statistical and scientific research purposes only. They will be used solely for reporting of aggregated information, and not for investigation of specific individuals or organizations.
3. No attempt will be made to re-identify respondents, and no use will be made of the identity of any person or establishment discovered inadvertently.
4. No attempt will be made to produce links among datasets provided by the Department or among data from the Department and other datasets that could identify individuals or organizations.
5. Any books, articles, conference papers, theses, dissertations, reports, or other publications that employ data obtained from the Department will cite the source of data in accordance with the Citation Requirement provided with each dataset.
6. An electronic copy of all reports and publications based on the requested data will be sent to the Department
[Department : The Department of Census and Statistics]
Citation requirements
"Department of Census and Statistics, Sri Lanaka Labour Force Survey 2011, Version 1.0 "
Access authority
| Name | Affiliation | URL | |
|---|---|---|---|
| Director General | Department of Census and Statistics | dgcensus@statistics.gov.lk | http//:www.statistics.gov.lk |
Location of Data Collection
Department of Census and Statistics
Archive where study is originally stored
Department of Census and Statistics
http://nada.statistics.gov.lk/index.php/catalog/1400
Cost: None
http://nada.statistics.gov.lk/index.php/catalog/1400
Cost: None
Disclaimer and copyrights
Disclaimer
The Department of Census and Statistics bears no responsibility for any results or interpretations arising from the secondary use of the data.
Copyright
(C) 2011, Department of Census and Statistics
Metadata production
DDI Document ID
DDI_LKA_2011_LFS_v01_M
Producers
| Name | Abbreviation | Affiliation | Role |
|---|---|---|---|
| Department of Census and Statistics | DCS | Minstry of Finance & Planning | Data Collection |
Date of Metadata Production
2011-06-30
DDI Document version
Version 1.1 (October 2014).
Adapted version of DDI-LKA-DCS-LFS-2011-v1.0 Version 1.0 ( June 2011 )
Edited fields:
ID and DDI - assigned Worldbank ID
Sampling information - to match LFS Annual Report 2011
Adapted version of DDI-LKA-DCS-LFS-2011-v1.0 Version 1.0 ( June 2011 )
Edited fields:
ID and DDI - assigned Worldbank ID
Sampling information - to match LFS Annual Report 2011