Household Income and Expenditure Survey - 1990-1991
Sri Lanka, 1990 - 1991
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Reference ID
LKA-DCS-HIES-1990-1991-v1.0
Producer(s)
Department of Census and Statistics
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Identification
Survey ID Number
LKA-DCS-HIES-1990-1991-v1.0
Title
Household Income and Expenditure Survey - 1990-1991
Country
| Name | Country code |
|---|---|
| Sri Lanka | LKA |
Study type
Income/Expenditure/Household Survey [hh/ies]
Series Information
Household Income & Expenditure Survey 1990 is the sixth in the series of surveys conducted by the Department of Census and Statistics under the National Household Survey Program.
Income and Expenditure Survey is conducted once in every 5 years and this is the sixth in the series. The survey was conducted during the period starting from June 1990 to May 1991, in twelve monthly rounds to capture the seasonal variation of the income and expenditure pattern of the households.
This survey provides comprehensive information on household income, individual income, household expenditure, per capita expenditure etc; which are required to study the living conditions of the different segments of the population. Additional background information on Demographic characteristics of the population was also collected.
The data was collected by direct interviews based on a special schedule which had three sections:-
(1) Demographic characteristics
(2) Household expenditure (Food and Non-food items)
(3) Household income (Monetary and Non-monetary income)
Income and Expenditure Survey is conducted once in every 5 years and this is the sixth in the series. The survey was conducted during the period starting from June 1990 to May 1991, in twelve monthly rounds to capture the seasonal variation of the income and expenditure pattern of the households.
This survey provides comprehensive information on household income, individual income, household expenditure, per capita expenditure etc; which are required to study the living conditions of the different segments of the population. Additional background information on Demographic characteristics of the population was also collected.
The data was collected by direct interviews based on a special schedule which had three sections:-
(1) Demographic characteristics
(2) Household expenditure (Food and Non-food items)
(3) Household income (Monetary and Non-monetary income)
Abstract
This survey provides information on household income and expenditure to be able to measure the levels and changes in the living condition of the people and to observe the consumption patterns .
Key objectives of the survey
- To identify the income patterns in Urban, Rural and Estate Sectors & provinces.
- To identify the income patterns by income levels.
- Average consumption of food items and non food items
- Expenditure patterns by sector and by different income levels.
Key objectives of the survey
- To identify the income patterns in Urban, Rural and Estate Sectors & provinces.
- To identify the income patterns by income levels.
- Average consumption of food items and non food items
- Expenditure patterns by sector and by different income levels.
Kind of Data
Sample survey data [ssd]
Unit of Analysis
Household, Individuals
Version
Version Description
v1.0: Full edited dataset, original version for internal DPD use.
Version Date
2009-02-13
Scope
Notes
The scope of HIES 1990/91 includes the following key sections:-
1). Demographic characteristics
2). Income
3). Expenditure
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Identification and demographic Information
- Address
- Province
- District
- D.S. Division
- Name of MC/UC
- G. N. Division
- Name of Village
- Name of Estate
- Primary Sample Unit Number
- Serial Number of Housing Unit
- Survey Month
- Number of households
- Name of the Head of the household
- Interviewer's & Supervising Office
- Demographic Characteristics
- Personal Information
- Individual's economic activities ( for persons 10 and above )
- Total land area owned and or cultivated by any member/s of household(including boarders, lodgers and servants)
Expenditure
- Daily consumption on Food, Drink and Tobacco
( Cereals, Prepared foods, Pulses, Vegetables, Leafy Vegetables, Yams & other, Meat, Fish, Dried fish, Eggs,
Coconuts, Condiments, Other foods, Milk and milk foods, Fats and Oils, Sugar, Juggery and Treacle,
Dried foods, Canned Fruits, Confectioner and Short eats, Beverages-Non alcoholic, Liquor, Drugs and
Tobacco)
- Household expenditure on Housing, Fuel and Light, Non-durable goods, Services and Consumer durables for
main Household ( Housing, Fuel and Light, Personal care expenses, Health expenses, Transport fees,
Maintenance of private Vehicles ,Communication, Education, Recreation entertainment, Non durable household
goods, Household services, Clothing and Textiles, Foot wear and other personal affects, Durable household
goods, Other expenses, Other ad-hoc expenses)
- Expenditure on Housing, Fuel & Light, Non-durable goods, Services & Consumer durables for boarders &
domestic servants.
Income
- Income from paid employment/s during last four weeks/ last calendar month
- Income from agricultural activities - (Paddy, Other seasonal crops)
- Income from other agricultural activities.
- Income From Non- agricultural activities
- Income from Other cash receipt during last calendar month / last 12 month
- Income by Chance or ad-hoc gains during last 12 months
- Income in kind during last calendar month
1). Demographic characteristics
2). Income
3). Expenditure
----------------------------------------------------------------------------------------------------------------------------
Identification and demographic Information
- Address
- Province
- District
- D.S. Division
- Name of MC/UC
- G. N. Division
- Name of Village
- Name of Estate
- Primary Sample Unit Number
- Serial Number of Housing Unit
- Survey Month
- Number of households
- Name of the Head of the household
- Interviewer's & Supervising Office
- Demographic Characteristics
- Personal Information
- Individual's economic activities ( for persons 10 and above )
- Total land area owned and or cultivated by any member/s of household(including boarders, lodgers and servants)
Expenditure
- Daily consumption on Food, Drink and Tobacco
( Cereals, Prepared foods, Pulses, Vegetables, Leafy Vegetables, Yams & other, Meat, Fish, Dried fish, Eggs,
Coconuts, Condiments, Other foods, Milk and milk foods, Fats and Oils, Sugar, Juggery and Treacle,
Dried foods, Canned Fruits, Confectioner and Short eats, Beverages-Non alcoholic, Liquor, Drugs and
Tobacco)
- Household expenditure on Housing, Fuel and Light, Non-durable goods, Services and Consumer durables for
main Household ( Housing, Fuel and Light, Personal care expenses, Health expenses, Transport fees,
Maintenance of private Vehicles ,Communication, Education, Recreation entertainment, Non durable household
goods, Household services, Clothing and Textiles, Foot wear and other personal affects, Durable household
goods, Other expenses, Other ad-hoc expenses)
- Expenditure on Housing, Fuel & Light, Non-durable goods, Services & Consumer durables for boarders &
domestic servants.
Income
- Income from paid employment/s during last four weeks/ last calendar month
- Income from agricultural activities - (Paddy, Other seasonal crops)
- Income from other agricultural activities.
- Income From Non- agricultural activities
- Income from Other cash receipt during last calendar month / last 12 month
- Income by Chance or ad-hoc gains during last 12 months
- Income in kind during last calendar month
Coverage
Geographic Coverage
National coverage.
Universe
For this survey a sample of buildings and the occupants therein was drawn from the whole island
Producers and sponsors
Primary investigators
| Name | Affiliation |
|---|---|
| Department of Census and Statistics | Ministry of Finance and Planning |
Funding Agency/Sponsor
| Name | Abbreviation |
|---|---|
| Government of Sri Lanka | GOSL |
Other Identifications/Acknowledgments
Sampling
Sampling Procedure
Sample Design
A two stage stratified random sample design was used in
this survey. Bach domain for which separate estimates were
required was made a separate stratum. As such each sector
(Urban, Rural, Estate) within each district was considered as a
separate stratum.
Sample Size
In this design the first stage units (FSU) were the census
blocks prepared at the 1981 Census of Population and the
second stage units (SSU) were the housing units. It was decided
to select 10 housing units from each selected census block.
Thus, a first stage sample of about 2,500 census blocks have to
be selected from the entire island.
Sample Allocation and Method of Selection
The allocation of 2,500 census blocks to each district
was made proportional. to the square root of the population· ( as
at 1981 Census ) in that district. These values have been rounded
to multiples of twelve. ( Refer page 5 of the final report attached in the external resources section)
It was decided to over sample the urban sector in each district
in comparison to the rural and estate sectors with the objective
of allocating roughly by one-third of the total sample.
Allocation between the rural and estate sectors in each
district was proportional to 1981 population. Within each
stratum, the assigned number of FSU's were selected with probability
proportionate to size (using the Census or adjusted housing
unit counts ) with replacement.
The lists of census units prepared for the Census of Population
and Housing 1981, of each selected block were updated to include
new ·housing units and to exclude ones which are no longer
in existence. This updating operation was also staggered over a
period of twelve months starting from May 1990 to April 1991.
For each FSU, updating was done about one month prior to the
scheduled interviewing.
A two stage stratified random sample design was used in
this survey. Bach domain for which separate estimates were
required was made a separate stratum. As such each sector
(Urban, Rural, Estate) within each district was considered as a
separate stratum.
Sample Size
In this design the first stage units (FSU) were the census
blocks prepared at the 1981 Census of Population and the
second stage units (SSU) were the housing units. It was decided
to select 10 housing units from each selected census block.
Thus, a first stage sample of about 2,500 census blocks have to
be selected from the entire island.
Sample Allocation and Method of Selection
The allocation of 2,500 census blocks to each district
was made proportional. to the square root of the population· ( as
at 1981 Census ) in that district. These values have been rounded
to multiples of twelve. ( Refer page 5 of the final report attached in the external resources section)
It was decided to over sample the urban sector in each district
in comparison to the rural and estate sectors with the objective
of allocating roughly by one-third of the total sample.
Allocation between the rural and estate sectors in each
district was proportional to 1981 population. Within each
stratum, the assigned number of FSU's were selected with probability
proportionate to size (using the Census or adjusted housing
unit counts ) with replacement.
The lists of census units prepared for the Census of Population
and Housing 1981, of each selected block were updated to include
new ·housing units and to exclude ones which are no longer
in existence. This updating operation was also staggered over a
period of twelve months starting from May 1990 to April 1991.
For each FSU, updating was done about one month prior to the
scheduled interviewing.
Deviations from the Sample Design
Non-Response
Of a sample of 25080 housing units selected only 19,401
households were covered in the survey. Northern and Eastern
provinces were excluded in the survey due to the prevailing conditions
in the area.
Of a sample of 25080 housing units selected only 19,401
households were covered in the survey. Northern and Eastern
provinces were excluded in the survey due to the prevailing conditions
in the area.
Response Rate
Out of 19401 households 95 percent the households were fully completed while
0.2 percent have refused.
Sector wise completion rates show that Urban sector had 93
percent, Rural sector 96 percent and the Estate sector 97 percent.
0.2 percent have refused.
Sector wise completion rates show that Urban sector had 93
percent, Rural sector 96 percent and the Estate sector 97 percent.
Data Collection
Dates of Data Collection
| Start | End |
|---|---|
| 1990-06-01 | 1991-05-31 |
Data Collection Mode
Face-to-face [f2f]
Supervision
The field officers (statistical officers) were supervised by the personnel above them in the organization hierarchy such as Statisticians, Deputy Directors & Statisticians attach to the Sample Survey Division
Data Collection Notes
Field data Collection
Data collection in the field was done by the Statistical Investigators of the Department under the direct supervision of district Statisticians/Statistical Officers.
Data collection in the field was done by the Statistical Investigators of the Department under the direct supervision of district Statisticians/Statistical Officers.
Data Collectors
| Name | Abbreviation | Affiliation |
|---|---|---|
| Department of Census and Statistics | DCS | Ministry of Finance and Planning |
Questionnaires
Questionnaires
Questionnaires
The survey schedule was designed to collect data on household basis and separate schedules were used for each household (identified according to the definition of the household) within the housing units selected for the survey. The survey Schedule consists of three main sections .
1. Demographic section
2. Expenditure
3. Income
The demographic characteristics and usual activities of the inmates belonging to the household are reported in the Demographic section of the schedule and close relatives temporarily living away are also listed in the section. Expenditure section has two sub sections to report food and non-food consumption data separately. Expenditure incurred on their own decisions by boarders and servants are recorded in the sub section under the expenditure section. The income has seven sub sections categorized according to the main sources of income.
The survey schedule was designed to collect data on household basis and separate schedules were used for each household (identified according to the definition of the household) within the housing units selected for the survey. The survey Schedule consists of three main sections .
1. Demographic section
2. Expenditure
3. Income
The demographic characteristics and usual activities of the inmates belonging to the household are reported in the Demographic section of the schedule and close relatives temporarily living away are also listed in the section. Expenditure section has two sub sections to report food and non-food consumption data separately. Expenditure incurred on their own decisions by boarders and servants are recorded in the sub section under the expenditure section. The income has seven sub sections categorized according to the main sources of income.
Data Processing
Other Processing
Data was processed in District-wise batches and stored in separate files.
Data processing included the following steps.
1. Counting and accepting the filled questionnaires 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 batches have been processed, all data files were combined together and then the following activities were
done :-
11) Re-coding of variables needed for analysis
12) Adding sample weights
13) Tabulations
Data processing included the following steps.
1. Counting and accepting the filled questionnaires 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 batches have been processed, all data files were combined together and then the following activities were
done :-
11) Re-coding of variables needed for analysis
12) Adding sample weights
13) Tabulations
Data Appraisal
Estimates of Sampling Error
Refer the pages 7 to 10 of the final report attached in the External Resources section.
Access policy
Contacts
| Name | Affiliation | URL | |
|---|---|---|---|
| Information Unit | Department of Census and Statistics | information@statistic.gov.lk | http//:www.statistics.gov.lk |
| Sample Survey Division | Department of Census and Statistics | Sample.survey@statistic.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.
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
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.
[Department : The Department of Census and Statistics]
Source : http://www.statistics.gov.lk/databases/data%20dissemination/DataDissaPolicy_2007Oct26.pdf
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
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.
[Department : The Department of Census and Statistics]
Source : http://www.statistics.gov.lk/databases/data%20dissemination/DataDissaPolicy_2007Oct26.pdf
Citation requirements
"Department of Census and Statistics, Household Income and Expenditure Survey 1990-1991, Version 1.0 of the public use dataset, February 2009, provided by the National Data Archive, Data Processing Division, www.statistics.gov.lk"
Access authority
| Name | Affiliation | URL | |
|---|---|---|---|
| Director General | Department of Census and Statistics | dgcensus@sltnet.lk | http//:www.statistics.gov.lk |
Disclaimer and copyrights
Disclaimer
The Department of Census and Satatistics bears no responsibility for any results or interpretations arising from the secondary use of the data.
Copyright
(C) 2009, Department of Census and Statistics
Metadata production
DDI Document ID
DDI-LKA-DCS-HIES-1990-1991-v1.0
Producers
| Name | Abbreviation | Affiliation | Role |
|---|---|---|---|
| Department of Census and Statistics | DCS | Ministry of Finance & Planning | Data Collection |
Date of Metadata Production
2009-02-13
DDI Document version
Version 1.0 ( February 2009 ).