Household Income and Expenditure Survey 2008
Samoa, 2008
Created on
Apr 25, 2019
Last modified
Apr 25, 2019
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Identification
Survey ID Number
WSM_2008_HIES_v01_M
Title
Household Income and Expenditure Survey 2008
Country
| Name | Country code |
|---|---|
| Samoa | WSM |
Study type
Income/Expenditure/Household Survey [hh/ies]
Series Information
The 2008 Household Income and Expenditure Survey (HIES) is the third such survey conducted by the Samoa Bureau of Statistics since the first one in 1997.
Abstract
The 2008 HIES collects information on Income and Expenditure of each sampled household in order to provide information on the economic characteristics of all households in Samoa. The main objectives of this survey are:
- To adjust the weights of the Consumer Price Index (CPI) using the household expenditure pattern of Samoan households and
- To provide data to determine the extent of hardship and the vulnerability of households in Samoa
This undertaking was funded by the Government of Samoa, with technical assistance provided by the Asian Development Bank through the services of Mr. David Abbott
- To adjust the weights of the Consumer Price Index (CPI) using the household expenditure pattern of Samoan households and
- To provide data to determine the extent of hardship and the vulnerability of households in Samoa
This undertaking was funded by the Government of Samoa, with technical assistance provided by the Asian Development Bank through the services of Mr. David Abbott
Kind of Data
Sample survey data [ssd]
Unit of Analysis
- Households
- Individuals
- Individuals
Scope
Notes
- Household Identification Particulars
- Household Demographic Characteristics
- Wages and salaries
- Self employment and other Business Activities
- Previous Jobs
- Pensions/Welfare Benefits
- Other Income
- Loan Information
- Contribution to Benefit Scheme
- Dwelling Characteristics
- Household Possession
- Dwelling Tenure
- Construction and Improvements of Dwelling
- Household Bills
- Transport Expenses
- Acquisition of Major Durables
- Education, Recreation, and Sport
- Medical and Health Expenses
- Overseas Travel
- Special Events
- Agriculture, Livestock, Fishing, and other Sales
- Household Consumption and Expenditure
- Household Demographic Characteristics
- Wages and salaries
- Self employment and other Business Activities
- Previous Jobs
- Pensions/Welfare Benefits
- Other Income
- Loan Information
- Contribution to Benefit Scheme
- Dwelling Characteristics
- Household Possession
- Dwelling Tenure
- Construction and Improvements of Dwelling
- Household Bills
- Transport Expenses
- Acquisition of Major Durables
- Education, Recreation, and Sport
- Medical and Health Expenses
- Overseas Travel
- Special Events
- Agriculture, Livestock, Fishing, and other Sales
- Household Consumption and Expenditure
Coverage
Geographic Coverage
National
Producers and sponsors
Primary investigators
| Name | Affiliation |
|---|---|
| Bureau of Statistics | Government of Samoa |
Producers
| Name | Role |
|---|---|
| Asian Development Bank | Technical assistance |
Funding Agency/Sponsor
| Name | Role |
|---|---|
| Government of Samoa | Funding |
Sampling
Sampling Procedure
Survey Methodology
The sampling technique used for the 2008 HIES is a stratified single stage cluster design. The first stage involved the selection of the Enumeration Area (EA) using Probability Proportional to Size (PPS) while the second stage involved the selection of a fixed cluster size.
To achieve a 10% sample of households, every tenth household was selected with a cluster size of 10 for North West Upolu, Rest of Upolu, and Savaii, and a cluster size of 5 for Apia Urban Area. Due to some variation in the number of households since the last population census in 2006 in which the frame was based, and the 2008 situation, the proportions of sampled households in the frame does not come to the required sample size.
The sampling technique used for the 2008 HIES is a stratified single stage cluster design. The first stage involved the selection of the Enumeration Area (EA) using Probability Proportional to Size (PPS) while the second stage involved the selection of a fixed cluster size.
To achieve a 10% sample of households, every tenth household was selected with a cluster size of 10 for North West Upolu, Rest of Upolu, and Savaii, and a cluster size of 5 for Apia Urban Area. Due to some variation in the number of households since the last population census in 2006 in which the frame was based, and the 2008 situation, the proportions of sampled households in the frame does not come to the required sample size.
Weighting
Weights
- Apia Urban Areas – 13.879960
- North West Upolu – 12.177931
- Rest of Upolu – 11.597364
- Savaii - 12.680927
Only those cases or households with Interview Status = 1 (completed) have weights.
- Apia Urban Areas – 13.879960
- North West Upolu – 12.177931
- Rest of Upolu – 11.597364
- Savaii - 12.680927
Only those cases or households with Interview Status = 1 (completed) have weights.
Data Collection
Dates of Data Collection
| Start | End |
|---|---|
| 2008-08 | 2008-09 |
Data Collection Mode
Face-to-face [f2f]
Data Collection Notes
The field work was organized in two rounds. From 4 to 31 August 2008, half of the selected households were enumerated. The other half of the selected households was enumerated from 1 to 28 September 2008.
Questionnaires
Questionnaires
The 2008 Household Income and Expenditure Survey questionnaire consists of four forms:
i) Household Control Form
ii) Household Form
iii) Individual Questionnaire
iv) Diary
i) Household Control Form
ii) Household Form
iii) Individual Questionnaire
iv) Diary
Data Processing
Other Processing
Imputation
All households with completed Household Form, Household Control Form, Individual Forms, and Diary Forms were tagged as completed, i.e., the Interview Status (PISTAT) is set to 1. For households with completed Household, Household Control and Individual Forms but only one Diary Form (one week only) the missing Diary Form was imputed by copying the completed Diary Form. These cases were also tagged as completed.
For some data items whose value of the entry was larger than the allocated digits in the data entry system, the correct entries were entered in the data item variable as part of the summarization program.
All households with completed Household Form, Household Control Form, Individual Forms, and Diary Forms were tagged as completed, i.e., the Interview Status (PISTAT) is set to 1. For households with completed Household, Household Control and Individual Forms but only one Diary Form (one week only) the missing Diary Form was imputed by copying the completed Diary Form. These cases were also tagged as completed.
For some data items whose value of the entry was larger than the allocated digits in the data entry system, the correct entries were entered in the data item variable as part of the summarization program.
Data Appraisal
Estimates of Sampling Error
Accuracy and reliability of estimates in a survey such as HIES are measured by computing the sampling errors, specifically standard errors and coefficient of variations. Although survey estimates are subject to both sampling and non sampling errors, only sampling errors can be calculated. Non sampling errors are minimized by means of quality control and operational control measures in all phases of the survey. In practice, estimates with coefficient of variations (CV) of less than 20% are considered as statistically ‘accurate’. On the other hand, those estimates with (CV) more than 20% are ‘indicative’ and should not be used at face value.
Note: Standard errors and coefficient of variation for key variables are presented in Appendix 2 of the 2008 HIES fina report.
Note: Standard errors and coefficient of variation for key variables are presented in Appendix 2 of the 2008 HIES fina report.
Metadata production
DDI Document ID
DDI_WSM_2008_HIES_v01_M
Producers
| Name | Abbreviation | Affiliation | Role |
|---|---|---|---|
| Development Economics Data Group | DECDG | The World Bank | Ducumentation of the DDI |
Date of Metadata Production
2012-03-21
DDI Document version
Version 01: (March 2012)