8731.0 - Building Approvals, Australia, Apr 2008 Quality Declaration
Previous ISSUE Released at 11:30 AM (CANBERRA TIME) 03/06/2008
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APRIL KEY POINTS
TOTAL DWELLING UNITS
PRIVATE SECTOR HOUSES
PRIVATE SECTOR OTHER DWELLING UNITS
VALUE OF BUILDING APPROVED
CHANGES IN THIS ISSUE
There are no changes in this issue.
Recently, the ABS has implemented improved methods of producing seasonally adjusted estimates, focused on the application of Autoregressive Integrated Moving Average (ARIMA) modelling techniques. The revision properties of the seasonally adjusted and trend estimates can be improved by the use of ARIMA modelling. ARIMA modelling relies on the characteristics of the series being analysed to project future period data. The projected values are temporary intermediate values, that are only used internally to improve the estimation of the seasonal factors. The projected data do not affect the original estimates and are discarded at the end of the seasonal adjustment process. The May 2008 edition of 8731.0 - Building Approval Australia will use concurrent seasonal adjustment with ARIMA modelling where applicable to reduce the level of revision to seasonally adjusted estimates.
REVISIONS THIS MONTH
Revisions to the total number of dwelling units approved in this issue are:
The inclusion of previously missing data from Victorian private certifiers resulted in an upward revision of 106 dwelling units to the estimates for Victoria in 2007-08. The inclusion of previously missing data from Gold Coast City Council resulted in an upward revision of 108 dwelling units to the estimates for Queensland in 2007-08.
A special article on ‘Changes in the mix of dwelling types’ in the years 1991-92 to 2006-07 is included in this issue (see page 7).
For further information about these and related statistics, contact the National Information and Referral Service on 1300 135 070 or Paul Pamment on Adelaide (08) 8237 7648.
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