ANZSCO Imputation in the National Apprentice and Trainee Collection. Technical Paper

Data relating to occupations has been collected in the national apprentice and trainee collection since 1994. The coding used conforms to classifications endorsed by the Australian Bureau of Statistics (ABS). The latest version issued from the ABS is the Australian and New Zealand Standard Classification of Occupations (ANZSCO). The classification previous to ANZSCO is the second edition of the Australian Standard Classification of Occupations (ASCO). Currently occupation data is collected using both ANZSCO and ASCO codes. Although ANZSCO was only introduced to the Apprentice and Trainee Collection in 2007, states and territories were asked to back-code ANZSCO on all contracts that were active as at 1 July 2000. Therefore while ASCO codes appear on records from the beginning of the collection, ANZSCO codes, only appear on records from 1 July 2000. Thus, although the database has a field for ANZSCO, the value is missing for all records prior to this date. This technical paper is a description of the methodology used to impute values for records in the National Apprentice and Trainee database that have missing ANZSCO codes. Appendices include: (1) Method (detailed); and (2) System charts. [For the accompanying report, "Apprentices and Trainees: September Quarter 2009," see ED508817.]