6503.0 - Household Expenditure Survey and Survey of Income and Housing, User Guide, Australia, 2015-16
ARCHIVED ISSUE Released at 11:30 AM (CANBERRA TIME) 10/10/2017
Page tools:
 Print Page
 Print All
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|
SAMPLING
For most states and territories, the exclusion of people in Very Remote areas has only a minor impact on any aggregate estimates that are produced because they constitute just a small proportion of the population. Very Remote and Remote areas are defined by the assignment of an Accessibility/Remoteness Index of Australia (ARIA) score. ARIA is a remoteness value (a continuous variable between 0 and 15) that measures the physical distance which separates people in a particular area and where their goods, services and opportunities for social interaction may be accessed. The ARIA categories, and how ARIA scores are calculated, are further explained in the Australian Statistical Geography Standard (ASGS): Volume 5 - Remoteness Structure, July 2011 (cat. no. 1270.0.55.005). Coverage Information was collected only from usual residents. Usual residents were residents who regarded the dwelling as their own or main home. Other people present were considered to be visitors and were not asked to participate in the survey. SAMPLE DESIGN AND SELECTION Sample design The SIH and HES sample were designed to produce reliable estimates for broad aggregates of income, wealth, housing and expenditure data for household residents in private dwellings of Australia, the State and Territories and for the capital cities and rest of state. More detailed estimates should be used with caution, especially for Tasmania, the Northern Territory and the Australian Capital Territory due to smaller samples in these localities. For more information see the 'Reliability of Estimates' section of this publication. The SIH and HES samples were designed together. HES is a subsample of the SIH sample and some dwellings were selected to complete both the SIH and HES questions while others were selected to complete only the SIH questions. In 2015-16 dwellings were selected through a stratified, multistage cluster design from the private dwelling framework of the ABS Population Survey Master Sample. Selections were distributed across a twelve month enumeration period so that the survey results are representative of income and expenditure patterns across the year. For the 2015-16 SIH and HES there was an additional sample of capital city households, targeting households whose main source of income was government pensions, benefits and/or allowances. These households were enumerated using a separate sample design, and received the combined SIH and HES questionnaires. In this additional sample, dwellings were targeted using information from the previous HES (2009-10), and information from the Socio-Economic Indexes for Areas (SEIFA). Households were screened using a short questionnaire to identify whether pensions and benefits were likely to be the main source of income for the household. 23,870 households were screened. One in four households were selected to complete the combined SIH and HES questionnaire and diaries regardless of the screening outcome. Information from this sample were used to assess the outcomes from the screening questionnaire for the whole sub-sample. SIH selected dwellings, sample loss and selected households In the 2015-16 SIH, 29,815 dwellings were initially selected for the main sample. When fieldwork commenced some dwellings selected for inclusion in the main sample were found to be out of scope units. Collectively these are referred to as sample loss, and are composed of the following groups:
In 2015–16, the SIH sample loss was 4,883 dwellings which accounted for 16% of the selected sample. Sometimes dwellings that have been selected for inclusion in a survey are found to comprise more than one actual dwelling because an additional residence, such as a 'granny flat', has been added to the original dwelling. In such cases, each actual dwelling becomes a separate household. For privacy reasons, residents of a selected dwelling can request that their details be provided separately from other dwelling residents. A separate household is then created for each group of residents. In 2015-16 SIH , 56 selected dwellings were split into two households and 21 were split into three or more households. A further 7,164 (24%) did not respond at all to the questionnaire, or did not respond adequately. Most of these were not able to take part in the survey during the collection period or were contacted but either refused to respond or were not able to respond adequately. The remainder of these households included:
126 households were excluded because the main income earners in the household did not adequately respond to questions about income sources and amounts. 229 households that were collected as part of the HES sample but did not have sufficient expenditure diary information were retained as part of the SIH sample. Final SIH sample Of the selected dwellings (24,932) that were contacted and in scope of the survey, 17,768 (71%) households were included as part of the final estimates.
The SIH sample is not evenly balanced over the course of the year. Due to under-performance of the sample design in the first half of the collection year, a top-up sample was selected and collected from January - July 2016. The fully responding households by each half of the collection year are provided in the table below. Weights adjust by quarter to ensure representativeness across the year. Fully responding sample, 2015-16 collection year
HES selected dwellings, sample loss and selected households Of the selected dwellings for HES there were 17,873 households in the scope of the survey. Of this initial sample, 2,579 dwellings (14%) were excluded as no contact was able to be made (e.g, vacant dwelling, holiday homes). A further 5,220 (29%) did not respond at all to the questionnaire, or did not respond adequately. Most of these were not able to take part in the survey during the collection period or were contacted but either refused to respond or were not able to respond adequately. The remainder of these households included:
110 households were excluded because the main income earners in the household did not adequately respond to questions about income sources and amounts. 229 households that were collected as part of the HES sample but did not have sufficient expenditure diary information were retained as part of the SIH sample. 74 households were retained after repair to an instrument error. In 2015-16 HES, 34 selected dwellings were split into two households and 12 were split into three or more households. Final HES sample Of the selected dwellings (15,294) that were contacted and in scope of the survey, 10,046 (66%) households were included as part of the final estimates.
The HES sample is not evenly balanced over the course of the year. Due to under-performance of the sample design in the first half of the collection year, a top-up sample was selected and collected from January - July 2016. The fully responding households by each half of the collection year are provided in the table below. Weights adjust by quarter to ensure representativeness across the year. FULLY RESPONDING HOUSEHOLDS, 2015-16 collection year
Additional pensioner sample The collection methodology for the pensioner sample was a two phase approach. In the first phase, a large number of households were required to answer a number of short screening questions to identify whether they were a pensioner household. In the second phase, one in four of the in scope selected households were selected for inclusion in HES survey regardless of the screening outcome. In addition, households which were screened as pensioner households were selected for interview using the same collection methodology as for the HES. The screening questions are included in the downloads tab of this publication. For the 2015-16 additional pensioner sample, 23,870 dwellings were screened. After the screening process 5,845 households were approached to complete the SIH and HES surveys. There were 3,603 households from this approached sample that responded with sufficient information to be included within the final SIH and HES samples. Document Selection These documents will be presented in a new window.
|
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
