PRODUCING THE MANUFACTURING EXPERIMENTAL ESTIMATES
Initial national ANZSIC class and state/territory ANZSIC subdivision experimental estimates for the manufacturing industry were produced by aggregating the contributing data streams, with additional rules being applied to produce state/territory ANZSIC subdivision experimental estimates:
- for businesses (from any stream) operating in only a single state or territory, their initial estimates contributed to the relevant state or territory and ANZSIC subdivision estimates
- for businesses, from the survey stream, operating in more than one state or territory, their initial estimates (i.e. directly collected EAS data) contributed to the states and territories of operation as recorded on their EAS form
- for businesses, from the modelled stream, operating in more than one state or territory, their initial estimates were prorated across the states and territories in which they operated, based on a factor calculated at the ANZSIC division level from surveyed units of similar size which operated in more than one state or territory. These modelled multi-state businesses accounted for only a small proportion of the estimates.
As explained earlier in this chapter initial experimental estimates at the national ANZSIC subdivision level were then adjusted to equal estimates published in the 2009-10 issue of Australian Industry
(cat. no. 8155.0). This adjustment removed some of the non-sampling error introduced through the regression modelling (see Chapter 4 for discussion of modelling bias). This adjustment was obtained by first calculating the difference between the Australian Industry
national ANZSIC subdivision estimates and the initial experimental ANZSIC subdivision estimates and then prorating the difference across the classes and states/territories within the ANZSIC subdivision. Proration only applied to the modelled stream, thus the level of proration for each class or state/territory was determined by the size of the modelled stream. Therefore, proration had a stronger impact on those classes and states/territories with a larger modelled stream.