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5 Students at boarding schools, patients in hospitals, residents of homes (e.g. retirement homes, homes for people with disabilities), and inmates of prisons are excluded from all supplementary surveys.
6 This supplementary survey was conducted in both urban and rural areas in all states and territories, but excluded approximately 120,000 people living in very remote parts of Australia who would otherwise have been within the scope of the survey. The exclusion of these people will have only a minor impact on any aggregate estimates that are produced for individual states and territories, except the Northern Territory where such people account for around 23% of the population.
7 The estimates in this publication relate to people covered by the survey in February 2008. In the LFS, coverage rules are applied which aim to ensure that each person is associated with only one dwelling, and hence has only one chance of selection in the survey. See Labour Force, Australia (cat. no. 6202.0) for more details.
8 Supplementary surveys are not always conducted on the full LFS sample. Since August 1994 the sample for supplementary surveys has been restricted to no more than seven-eighths of the LFS sample.
9 The initial sample for the February 2008 LFS consisted of 39,176 private dwelling households and special dwelling units. Of the 31,671 private dwelling households and special dwelling units that remained in the survey after sample loss (e.g. households selected in the survey which had no residents in scope for the LFS, vacant or derelict dwellings and dwellings under construction), approximately 30,219 or 95.4% were fully responding to the Labour Mobility Survey. The number of completed interviews obtained from these private dwelling households and special dwelling units (after taking into account scope, coverage and sub-sampling exclusions) was 34,167.
RELIABILITY OF THE ESTIMATES
10 Estimates in this publication are subject to sampling and non-sampling errors:
11 The estimates are based on information collected in the survey month and, due to seasonal factors, may not be representative of other months of the year.
12 Country of birth data are classified according to the Standard Australian Classification of Countries (SACC), 1998 (cat. no. 1269.0).
13 From 2008, occupation data are classified according to the ANZSCO - Australian and New Zealand Standard Classification of Occupations First Edition, 2006 (cat. no. 1220.0). The new classification replaces ASCO - Australian Standard Classification of Occupations Second Edition, 1997 (cat. no. 1220.0). Data classified according to ASCO can be obtained on request.
14 From 2008, industry data are classified according to the Australian and New Zealand Standard Industrial Classification (ANZSIC), 2006 (cat. no. 1292.0). The new classification replaces Australian and New Zealand Standard Industrial Classification (ANZSIC), 1993 (cat. no. 1292.0). Data classified according to ANZSIC 1993 can be obtained on request.
15 Educational attainment data are classified according to Australian Standard Classification of Education (ASCED) (cat. no. 1272.0).
COMPARABILITY OF TIME SERIES
16 Revisions are made to population benchmarks for the LFS after each five-yearly Census of Population and Housing. The last such revision was made in February 2004 to take account of the results of the 2001 Census of Population and Housing. Estimates from supplementary surveys conducted from and including February 2004 are therefore based on the revised population benchmarks.
17 The scope of the Labour Mobility Survey was expanded in February 2006 to include all people aged 15 years and over. In this issue, Table 1 has been revised to present the new time series for 2006 and 2008. A new table, Table 12, has been introduced to continue the time series for persons aged 15-69 years, the basis of surveys prior to 2006.
18 The introduction of ANZSCO First Edition and ANZSIC 2006 have meant that data relating to change in occupation and industry are not comparable with previous years. Consequently, time series data for 'Whether changed occupation (last to current employer/business)' and 'Whether changed industry (last to current employer/business)' have been removed from Table 1 and Table 12. In previous issues Table 2 presented time series data for 'Duration with current employer/business'. This information is now presented in Table 1. Users need to exercise care when comparing estimates from 2008 with previous years data.
19 The following table compares 'Whether changed Major occupation group (last to current employer/business)' classified by ANZSCO First Edition 2006 and ASCO Second Edition 1997. The differences between the two classifications are demonstrated, for example, by the number of people who were categorised as both 'Same occupation' under ANZSCO First Edition and 'Changed occupation' under ASCO Second Edition.
20 The following table compares 'Whether changed industry Division (last to current employer/business)' classified by ANZSIC 2006 and ANZSIC 1993. The differences between the two classifications are demonstrated, for example, by the number of people who were categorised as both 'Same industry' under ANZSIC 2006 and 'Changed industry' under ANZSIC 1993.
21 In 2008, data item 23, 'Whether changed occupation group (with current employer for one year or more)' is derived and output based on change at Major and Minor occupation levels. In previous years, this was derived and output based on change at any level. The following table compares estimates for data items 23a and 23b with how data item 23 was derived in 2006.
22 In 2008 and previous years, other data items relating to change in occupation and change in industry are derived and output based on change in Major occupation group and change in industry Division. Data item labels have been amended in 2008 to reflect this.
COMPARABILITY WITH MONTHLY LFS STATISTICS
23 Due to differences in the scope and sample size of this supplementary survey and that of the monthly LFS, the estimation procedure may lead to some small variations between labour force estimates from this survey and those from the LFS.
24 Similar surveys were conducted in November 1972, February 1975, February 1976 and annually from February 1979 to February 1992. Since then it has been conducted biennially. Results were published in Labour Mobility, Australia (cat. no. 6209.0).
PREVIOUS REVISIONS TO HISTORICAL DATA
25 Historical estimates of the number and proportion of people who were job mobile for the periods 1990 to 1996 were revised in the 1998 publication. Previously published estimates for reference periods from 1990 to 1996 will still contain incorrectly derived data. If you require further information about these revisions, please contact the National Information Referral Service on 1300 135 070 or the Labour Market Section on (02) 6252 7206.
26 The ABS plans to conduct this survey again in February 2010.
27 ABS publications draw extensively on information provided freely by individuals, businesses, governments and other organisations. Their continued cooperation is very much appreciated: without it, the wide range of statistics published by the ABS would not be available. Information received by the ABS is treated in strict confidence as required by the Census and Statistics Act 1905.
28 Other ABS publications which may be of interest include:
29 Current publications and other products released by the ABS are available from the Statistics Page on the ABS website. The ABS also issues a daily Release Advice on the website which details products to be released in the week ahead.
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