6541.0.30.001 - Microdata: Income and Housing, Australia, 2017-18 Quality Declaration 
Latest ISSUE Released at 11:30 AM (CANBERRA TIME) 13/11/2019   
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DATA ITEMS


The 2017–18 Survey of Income and Housing (SIH) collected information using household and individual questionnaires.

The Data Item List includes record level items, populations and classification details. It contains the following worksheets:

  • A Contents page with links to the different sections of the Data Item List.
  • Subject index, which includes both item descriptions and identifiers. It can be used to locate a variable by subject when the item name is not known.
  • Field index, showing item identifiers and numbers only. It is sorted alphabetically by item name, and presents a consolidated list of survey variables.
  • Household level data items, which provides a full listing of items that are output at Household level.
  • Income Unit level data items, which provides a full listing of items that are output at Income Unit level.
  • Person level data items, which provides a full listing of items that are output at Person level.
  • Loans level data items, which provides a full listing of items that are output at Loans level.
  • Child care data items, which provides a full listing of items that are output at child care level.
  • Superannuation data items, which provides a full listing of items that are output at Superannuation level.
  • Wealth data items, which provides a full listing of items that are output at Wealth level.
  • Detailed categories for the Wealth classification.
  • Other Classifications.
  • Contents of the Confidentialised Unit Record File (CURF).
  • Changes from 2015–16.

The Data item list is available on the 'downloads' tab and contains information about the data items available on the different detailed microdata products.


BASIC CURF

The Basic CURF contains information at Household, Income Unit, Person and Loan levels for the SIH.

Users intending to purchase the Basic CURF should ensure the 2017–18 SIH suits their data needs. Please review the data item list to see the topics and the level of detail that is available for the Basic CURF.

For confidentiality and/or usability reasons, some data item values have been collapsed and/or restricted for use on the microdata products. Additionally, data may have been masked on the Basic CURF to prevent identification of persons.


TABLEBUILDER AND DETAILED MICRODATA FILE (DATALAB)

The TableBuilder and Detailed Microdata File (DataLab) products contain information at Household, Income Unit, Person, Superannuation, Wealth, Child care and Loan levels for the SIH.

Users intending to use either of these products should ensure the 2017–18 SIH suits their data needs. Please review the data item list to see the topics and the level of detail that is available for TableBuilder or the Detailed Microdata File.

For further information about how to access detailed Microdata refer to The Responsible Use of ABS Microdata, User guide.


NOTES ON SPECIFIC DATA ITEMS

Many of the data items included on the CURF are self-explanatory. The Glossary in the Survey of Income and Housing, User Guide, Australia, 2017–18 provides links to terms and definitions for most of the survey's data items. However, some items that require further explanation are defined below.

Identifiers

There are several identifiers on records at each level of the file.

Each household has a unique random identifier. This identifier appears on the household level (ABSHID), and is repeated on the income unit, person, loans level records relating to that household.

Each family within the household is numbered sequentially. Non family members, single person households and persons in group households have a sequential "family number" commencing at 50. Family number (ABSFID) appears on the income unit level and the person level. The combination of household and family number uniquely identifies a family.

A family has one or more income units and each income unit within the family is numbered sequentially. Income unit number (ABSIID) appears on the income unit level and the person level. The combination of household, family and income unit number uniquely identifies an income unit.

An income unit has one or more persons and each person within the income unit is numbered sequentially. Person number (ABSPID) appears on the person level. The combination of household, family, income unit and person number uniquely identifies a person.

A household may have one or more loans and each loan within the household is numbered sequentially. Loan number (ABSLID) appears on the loans level. The combination of a household and loan number uniquely identifies a loan.

Additional detail and data items on Basic CURF

Continuing the approach from SIH 2015–16, a selection of data items and additional detail of high user interest on previous Expanded CURF are now available instead on the Basic CURF. These include:
  • Continuous age
  • Detailed occupation and industry codes
  • Detailed hours worked (individual hours) and duration of unemployment (individual weeks)
  • Separating NT and ACT
  • Detailed age and sex of children between the ages of 0 and 14 years, represented as counts on the income unit level.

Users are advised that for the following geographies on the SIH 2017–18 Basic CURF there are no boundary differences between the 2011 ASGS and 2016 ASGS.
  • Area of usual residence
  • State or Territory of usual residence
As a result, Area of usual residence ASGS 2011 (GCCSA) (AOURBC) and State or Territory of usual residence 2011 (STATEHEC) can also be used when 2016 geographies are required.

Imputation Flags

Imputation flags exist for each module in the questionnaire, rather than for specific data items. A value of 1 indicates partial imputation where at least one question in the module was imputed. Referring to the contents of the questionnaire module can provide an indication of whether particular data items may have included imputed data. The number of flags with a value of 1 for a particular record provides an indication of the extent of imputation in that record. Imputation flag variable names generally start with "IMP".

Multiple Response Data Items

A number of topics in 2017–18 SIH contain multiple response data items, including housing, child care, disability and superannuation. In these instances, respondents were able to select one or more response category within a question.

Using child care as an example, in these items the output data is multi-response in nature. Child care data items on the Basic CURF are:
  • Income unit level - Types of formal child care income unit used in the last 4 weeks (TYPFCIUA--TYPFCIUF)
  • Person level - All reasons lack of child care prevents parent from working (UNMET07A--UNMET07J)

These items capture multiple responses where a person provides more than one type of child care. The first response is captured in the first, or 'A', position (e.g. TYPFCIUA), and additional responses are in the second and then third and higher, or 'B' and 'C' and higher, positions (e.g. TYPFCIUB, TYPFCIUC). If only one response is possible, for example 'none of the above' then this response may also appear in the 'A' position. Where a data item does not apply, (e.g. an income unit does not use child care) then a value of 9 or 99 for 'Not applicable' will appear in the first position (e.g. TYPFCIUA). The 'Null response' (value of 0 or 00) is a default code and should be ignored. All of these categories should be used in analysis. For specific information on the number of item repeats and the category labels and values refer to the Data Item List available from the 'downloads' tab.


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