The purpose of the Household Income and Expenditure Survey (HIES) survey is to obtain information on the income, consumption pattern, incidence of poverty, and saving propensities for different groups of people in Kiribati. This information will be used to guide policy makers in framing socio-economic developmental policies and in initiating financial measures for improving economic conditions of the people.
Some more specific outputs from the survey are listed below:
a) To obtain expenditure weights and other useful data for the revision of the consumer price index;
b) To supplement the data available for use in compiling official estimates of household accounts in the systems of national accounts;
c) To supply basic data needed for policy making in connection with social and economic planning;
d) To provide data for assessing the impact on household living conditions of existing or proposed economic and social measures, particularly changes in the structure of household expenditures and in household consumption;
e) To gather information on poverty lines and incidence of poverty throughout Kiribati.
In addition newly developed modules were developed for the 2019 HIES including
ANAEMIA & DIABETIC TEST
FOOD AWAY FROM HOME
DISABILITY, HEALTHY LIVING & TIME-USE
DEPRIVATION AND FINANCIAL INCLUSION
GEOGRAPHIC INFORMATION + PHOTO
VILLAGE RESOURCE SURVEY (VRS)
Kind of Data
Sample survey data [ssd]
Version 00: pre data capture documentation
This documentation is produced prior to enumeration and data compilation
National Coverage and Regional Island Groups (Northern Gilberts, South Tarawa, Central Giberts, Southern Gilberts, Linix).
There are five main populations of interest for which estimates are required for the 2019 Kiribati HIES: South Tarawa, Northern, Central and Southern Gilbert Islands, and the Line Islands.
Unit of Analysis
Persons, Households, Expenditure items.
The survey covered all persons resident in private households.
Producers and sponsors
Authoring entity/Primary investigators
Kiribati National Statistical Office
Government of Kiribati
Kiribati Ministry Of Finance
NZ Ministry of Foreign Affairs and Trade
Documentation for Kiribati HIES Sample Selection:
In determining an appropriate sample size for a survey of this nature, numerous factors come into the equation. These include:
a) The degree of accuracy required for key estimates
b) The population size of the country
c) The manner in which the sample is selected
d) Cost or staffing constraints which may exist
e) Whether or not estimates are required for sub-populations
f) The level of variability in the data being collected
Each of these factors have different magnitudes of importance, but the major priority should always be on selecting a sample big enough to produce results of suitable accuracy. Many of these issues are generally known as well - for instance:
· A user group may pre-specify what level of accuracy they may wish to achieve for the survey
· The population of a country can normally be estimated to a reasonable level of accuracy
· The sample selection technique adopted is known
· Cost and staff constraints are generally known, and
· A user group can once again provide information on whether estimates for sub-populations are required.
The Kiribati 2019 HIES aims to release outputs at the island division level and National level.
The targeted sample size has been determined around 2,000 households based on the results of the previous 2006 HIES that provided the following RSE at the strata level:
n av cluster size RSE
Sth. Tarawa 230 10,5 6,3%
Northern 245 11,1 5,7%
Central 217 12,1 6,7%
Southern 244 11,1 19,0%
Line Is. & Phoenix 225 13,2 14,7%
Total 1161 11,6 5,4%
The 2006 Kiribati HIES was based on stratified cluster sampling strategy. The selection of households was based on a three stages selection: island, EA and households. This is the reason why the RSE are above 5% in all domains.
In order to improve the quality of the 2019 HIES results, decisions were made to increase the total sample size (making sur we will not over pass the allocated budget) and to use a stratified cluster sampling strategy based on a 2 stage selection (selection of EA and households).
The optimal allocation of 1,800 households was used as a first step to the sample allocation, and through several adjustments, the total sample size is 2,180 households with a cluster size of 12 households.
Sample size Cluster size Nb of EAs RSE
Sth. Tarawa 600 12 50 3,8%
Northern 400 12 33 4,3%
Central 300 12 25 5,2%
Southern 480 12 40 13,1%
Line Is. & Phoenix 400 12 33 9,3%
Total 2180 182 2,9%
Each survey team is made of 3 staff, 1 supervisor and 2 interviewers that will be responsible for 6 households each
5 teams (15 staff) will be hired and trained, 4 teams based in South Tarawa and covering South Tarawa, Central, Southern and Northern groups, and 1 team based in Kiritimati island covering the Line group.
The random selection of PSU (EAs) was based on a probability proportional to size selection within each domain.
Within each selected EAs, a total of 18 households are selected in order to have a replacement list of 6 households (list B) and 12 to contact in priority (list A).
The response rate was % of the total number of households
Sample weights were calculated for each stratum and adjusted for non-response. Weights for the survey were derived using the inverse of the households probability of selection.
Dates of Data Collection (YYYY/MM/DD)
Mode of data collection
Responsibilities and Functions of the Supervisor
To supervise in accordance with the directions of the Statistics Office staff, the completion of the HIES 2019 for all selections, specifically to:
a) With assistance from the Island Council, undertake the recruitment of interviewers on their respective islands;
b) Ensure that all schedules and materials are distributed to interviewers according to the instructions of the NSO staff;
c) Ensure that the interviewers understand which household he/she is responsible for and that none are left out;
d) With assistance from the interviewer, conduct information sessions for selected households prior to collecting information from those households;
e) Visit interviewers regularly during the collection phase to make sure they are carrying out their responsibilities correctly;
f) Make sure all forms from the interviewers are accounted for at the end of each 3 week period;
g) Do spot checks for completeness of questionnaires and deal with any problems that might arise in the field;
h) Dispatch all completed questionnaires (in sealed envelopes) to the NSO after he/she is fully satisfied that
(i) All the entries of the questionnaires are properly completed.
The National Statistics Office recruited and trained X supervisors. The completed survey forms were processed by staff of the National Statistics Office who recorded their receipt from the supervisors and checked the questionnaires for completeness.
Type of Research Instrument
Four questionnaire forms were designed to collect information on household size and composition, personal and household income, major household expenditure, and regular food and household supply expenditures in the diaries. The income and expenditure questionnaires were administered by interview during the survey period, and the diaries were completed by the households over a two-week period. An additional questionnaire was developed and administered to collect detailed information on health facility utilization and access, educational attendance and attainment, and labour force status.
The questionnaires were published in English.
There are 16 sections in the Expenditure Questionnaire which relate to the following:
1. HOUSEHOLD ID
2. HOUSEHOLD MEMBER ROSTER
3. PERSON DETAILS
4. ANAEMIA & DIABETIC TEST
5. FOOD RECALL
6. FOOD AWAY FROM HOME
8. NON-FOOD RECALL
9. HOUSEHOLD DETAILS
10. DIETARY RECALL
11. DISABILITY, HEALTHY LIVING & TIME-USE
12. DEPRIVATION AND FINANCIAL INCLUSION
13. MIGRANT WORKER
14. GEOGRAPHIC INFORMATION + PHOTO
15. MARKET SURVEY
16. VILLAGE RESOURCE SURVEY (VRS)
Kiribati National Statistics Office
Government of Kiribati
The completed questionnaires were entered into the Survey Solutions CAPI data entry system.
The HIES data is protected under the National Statistics Act and cannot be disclosed to any individual without authorisation from the Government Statistician.
"Kiribati National Statistics Office, Household Income and Expenditure Survey 2006 (HIES 2006), Version 01 of the licensed dataset (December 2008), provided by the Microdata Library. https://microdata.pacificdata.org/index.php/home"
Disclaimer and copyrights
All publications need to be cleared by National Statistics Office (NSO) before publication as under the Statistics Act the NSO only has authority to publish national statistical data.