DECEMBER KEY FIGURES
 | | Dec qtr 07 | Sep qtr 07 to Dec qtr 07 | Dec qtr 06 to Dec qtr 07 | |
| | $m | % change | % change | |
TREND ESTIMATES(a) | |
| |
| Value of work done | | | | |
| For the private sector | 8 208.3 | -1.0 | 15.0 | |
| For the public sector(b) | 4 504.2 | 3.9 | -3.1 | |
| Total engineering construction | 12 722.6 | 0.8 | 8.4 | |
SEASONALLY ADJUSTED ESTIMATES(a) | |
| |
| Value of work done | | | | |
| For the private sector | 8 126.8 | -1.6 | 13.7 | |
| For the public sector(b) | 4 633.5 | 6.3 | 2.8 | |
| Total engineering construction | 12 760.3 | 1.1 | 9.5 | |
| |
| (a) Chain volume measures, reference year 2005-06. |
| (b) Includes work done by the private sector for the public sector and work done by the public sector. |
Value of work done, Chain volume measures
| Value of work done, Chain volume measures - Trend estimates
|
DECEMBER KEY POINTS
VALUE OF WORK DONE, CHAIN VOLUME MEASURES
TOTAL
- The trend estimate for the value of total engineering construction work done rose by 0.8% in the December 2007 quarter.
- The seasonally adjusted estimate for the value of total engineering construction work done rose 1.1%, to $12,760.3m, in the December quarter.
PRIVATE SECTOR
- The trend estimate for the value of work done for the private sector fell by 1.0% in the December quarter.
- The seasonally adjusted estimate for the value of work done for the private sector fell 1.6% in the December quarter to $8,126.8m.
PUBLIC SECTOR
- The trend estimate for the value of work done for the public sector rose by 3.9% in the December quarter.
- The seasonally adjusted estimate for the value of work done for the public sector rose 6.3%, to $4,633.5m, in the December quarter.
VALUE OF WORK COMMENCED
- The value of work commenced in the December quarter was $15,322.3m, a fall of 44.6% from the September quarter.
NOTES
FORTHCOMING ISSUES
| ISSUE (QUARTER) | Release Date |
| March 2008 | 1 July 2008 |
| June 2008 | 30 September 2008 |
ABOUT THIS ISSUE
This publication updates the preliminary estimates released in
Construction Work Done, Australia (cat. no. 8755.0) on 27 February 2008.
CHANGES IN THIS ISSUE
There are no changes in this issue.
SIGNIFICANT REVISIONS THIS QUARTER
Compared with the current price original terms estimates published in the previous issue of this publication:
- The June quarter estimates have been revised downwards by $153.7m for work commenced, downwards by $166.4m for work done, and upwards $12.6m for work yet to be done. These revisions occurred predominantly in 'Private for Private' 'oil, gas and other hydrocarbons' in Western Australia.
DATA NOTES
This release has used ARIMA modelling where appropriate for individual time series. The revision properties of the seasonally adjusted and trend estimates can be improved by the use of autoregressive integrated moving average (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 ARIMA model is assessed as part of the annual reanalysis and following the 2008 annual reanalysis 58% of the applicable Engineering Construction Work Done series in 8762.0 will use an ARIMA model. For more information on the details of ARIMA modelling see feature article:
Use of ARIMA modelling to reduce revisions in the October 2004 issue of
Australian Economic Indicators (cat. no. 1350.0).
INQUIRIES
For further information about these and related statistics, contact the National Information and Referral Service on 1300 135 070 or Willie Hynd on Adelaide (08) 8237 7646.
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