Occupational mobility in the ALife data: how reliable are occupational patterns from administrative Australian tax records?

The purpose of this paper is to compare the distribution of occupation and rates of occupational
mobility in the ATO Longitudinal Information Files (ALife) and the Household Income and Labour
Dynamics in Australia (HILDA) datasets. As tax is not occupation dependent, occupation data
from tax records may not be reliable. We find that occupational mobility in the ALife data is less
than half that in the nationally representative HILDA data. In contrast, the distribution of
occupation and its relationship with most key socio-economic characteristics appear relatively
similar across the two datasets. However, occupation evolves differently over time in the two
datasets and there are some differences between sexes.