The Department of Census and Statistics (DCS) conducts the Household Income and Expenditure Survey (HIES) under the National Household Survey Programme. The HIES had been conducted in combination with Labour Force Survey named as Labour Force and Socio-Economic Survey till 1990. DCS first initiated the HIES as a separate survey in 1990 and since then it has been continued once in every five years till 2006/07. In response to the rapidly changing economic conditions the DCS decided to conduct the HIES once in every three years starting from 2009/10 which enabled to monitor the income and spending patterns in the country far more frequently.
Generally the HIES is conducted over a period of 12 consecutive months to capture seasonal variations of income and expenditure patterns in Sri Lanka. The HIES 2012/13 is the eighth in its series.
Main objectives of the Household Income and Expenditure Survey are:
i. To measure levels and observe the changes of living conditions of individuals and households
ii. To estimate household income and expenditure
iii. To compute several important poverty indicators
iv. To provide information to calculate price indices
v. To analyze the impact of social protection transfers
vi. To provide information on different living standard measurements.
Kind of Data
Sample survey data [ssd]
Unit of Analysis
- Consumption good and services
The survey covered the following topics:
- School education
- Food and non-food ex-penditure
- Inventory of durable goods and debts of the households
- Access to facilities in the area
- Housing Information
- Agriculture holdings and Livestock
Producers and sponsors
Department of Census and Statistics (DCS)
Ministry of Finance and Planning
Government of Sri Lanka
Funded the study
Sample design of the survey is two stage stratified and the Urban, Rural and the Estate sectors in every district are the selection domains. Thus the district is the main domain used for the stratification. The sampling frame is the list of housing units prepared for the Census of Population and Housing (CPH) 2011.
Primary sampling units (PSUs) are the census blocks selected at the first stage selection and the sampling frame, which is the collection of all the census blocks prepared in CPH 2011is used for the selection.
Secondary Sampling Units (SSUs) or Final sampling units (FSUs) are the housing units selected at the second stage from the 2,500 PSUs selected at the first stage. From each PSU, 10 SSUs (housing units) are systematically selected giving each housing unit in the PSU an equal chance to be selected for the survey. The total sample of size 25,000 housing units results at the end of the sampling process and this sample represents the whole country in different probabilities depend on the different sample sizes allocated for the selection domains.
Allocation of the number of PSUs or determining the sample sizes for the districts is made proportionate to the number of housing units and the standard deviations of the mean household expenditure values reported in the respective districts in previous surveys (Neymann Allocation). Sector allocation of the district sample is made proportionate to the square roots of the sizes of the respective selection domains (Urban, Rural and Estate sectors in the district). The sample of PSUs within the selection domain is equally distributed among the 12 survey months and the monthly sample too is equally dispersed among all the weeks in the month assigning a specific week for each PSU for the survey activities.
Sample allocation for sectors
sector == Housing units Selected == Housing units Responded == Households responded
Sri Lanka 6557 5407 5442
Urban 1720 1386 1397
Rural 4149 3457 3475
Estate 688 564 570</pre>
Dates of Data Collection
Frequency of Data Collection
Every 3 years
Data Collection Mode
Data Collection Notes
The data was collected over 12 months period.
Department of Census and Statistics
Ministry of Finance and Planning
The HIES questionnaire was revised in 2006/07 and now it con-sists of nine sections to collect household information covering the following areas.
ii. School education
iv. Food and non-food expenditure
vi. Inventory of durable goods
vii. Access to facilities in the area and debts of the households
viii. Housing Information
ix. Agriculture holdings and Livestock
Use of the dataset must be acknowledged using a citation which would include:
- the Identification of the Primary Investigator
- the title of the survey (including country, acronym and year of implementation)
- the survey reference number
- the source and date of download
The user of the data acknowledges that the original collector of the data, the authorized distributor of the data, and the relevant funding agency bear no responsibility for use of the data or for interpretations or inferences based upon such uses.