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 | | | |
| Building | 16 252.0 | -0.4 | -0.6 |
| Residential | 9 660.7 | -0.6 | -2.0 |
| Non-residential | 6 591.8 | -0.2 | 1.6 |
| Engineering | 12 661.3 | 0.6 | 7.9 |
| Total construction | 28 919.6 | - | 3.0 |
SEASONALLY ADJUSTED ESTIMATES(a) |
|
| Value of work done | | | |
| Building | 16 175.2 | -2.2 | -1.6 |
| Residential | 9 701.4 | -0.2 | -1.2 |
| Non-residential | 6 473.8 | -5.1 | -2.2 |
| Engineering | 12 679.4 | 0.7 | 8.6 |
| Total construction | 28 854.5 | -1.0 | 2.6 |
|
| - nil or rounded to zero (including null cells) |
| (a) Chain volume measures, reference year 2005-06. |
Value of construction work done, Volume terms - Trend estimates
| Value of building work done, Volume terms - Trend estimates
|
DECEMBER KEY POINTS
VALUE OF WORK DONE, CHAIN VOLUME MEASURES
TOTAL CONSTRUCTION
- The trend estimate for the value of total construction work done remained unchanged in the December quarter 2007.
- The seasonally adjusted estimate for the value of total construction work done fell 1.0%, to $28,854.5m, in the December quarter.
BUILDING
- The trend estimate for the value of building work done fell 0.4% in the December quarter. Residential building work done fell 0.6% while non-residential fell 0.2%.
- The seasonally adjusted estimate for the value of building work done fell 2.2% in the December quarter, to $16,175.2m. Residential building work done fell 0.2% to $9,701.4m and non-residential building work done fell 5.1%, to $6,473.8m.
ENGINEERING
- The trend estimate for Engineering work done rose 0.6% in the latest quarter.
- The seasonally adjusted estimate for Engineering work done rose 0.7%, to $12,679.4m, in the December quarter.
NOTES
FORTHCOMING ISSUES
| ISSUE (QUARTER) | Release Date |
| March 2008 | 28 May 2008 |
| June 2008 | 27 August 2008 |
ABOUT THIS ISSUE
This publication provides an early indication of trends in building and engineering construction activity. The data are estimates based on a response rate of approximately 80% of the value of both building and engineering work done during the quarter. More comprehensive and updated results will be released in
Building Activity, Australia (cat. no. 8752.0) on 18 April 2008 and in
Engineering Construction Activity, Australia (cat. no. 8762.0) on 17 April 2008.
CHANGES IN THIS ISSUE
As noted last quarter, 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 63% of the applicable Construction Work Done series and 58% of the applicable Engineering Construction Work Done series 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).
DATA NOTES
There are no notes about the data.
INQUIRIES
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 7647.
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