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6602.0 - Microdata: Longitudinal Labour Force, Australia, 2008-10 Quality Declaration 
Latest ISSUE Released at 11:30 AM (CANBERRA TIME) 10/12/2012  First Issue
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Contents >> Survey Methodology >> Estimation method


SURVEY METHODOLOGY

<< Previous Section: Introduction


ESTIMATION METHOD

The estimation method used in the Labour Force Survey is Composite Estimation, which was introduced in May 2007. Composite Estimation combines data collected in the previous six months with the current month's data to produce the current month's estimates, thereby exploiting the high correlation between overlapping samples across months in the Labour Force Survey. The Composite Estimator combines the previous and current month's data by applying different factors according to length of time in the survey. After these factors are applied, the seven months of data are weighted to align with current month population benchmarks (see Population benchmarks)

For more details, see the Information Paper: Forthcoming Changes to Labour Force Statistics, 2007 (cat. no. 6292.0).

The Weight for the current month [WEIGHT] variables in this release of the Longitudinal Labour Force Survey (LLFS) CURF are the same as the weights used to produce the estimates in the November 2012 editions of the main Labour Force, Australia publications (cat. no. 6202.0, 6291.0.55.001 and 6291.0.55.003). These weights are generated using composite estimation, and cross-sectional (point-in-time) estimates produced from the CURF will closely match the published original estimates.

However, the weights have no relationship to the estimates published in the supplementary survey publications, as these are calculated using different benchmarks and estimation methods. Weights from the supplementary surveys are not provided in the CURF. When calculating estimates based on supplementary survey data items in this CURF, they may not match official estimates produced in the publications corresponding to those supplementary surveys.


Related Information

Labour Force, Australia: Explanatory Notes - 15. Estimation Method (cat. no. 6202.0)
Labour Statistics: Concepts, Sources and Methods: 18. Methods Used in ABS Household Surveys - 18.42 Estimation Methods (cat. no. 6102.0.55.001)
Labour Statistics: Concepts, Sources and Methods: 20. Labour Force Survey - 20.19 Estimation (cat. no. 6102.0.55.001)
Information Paper: Forthcoming Changes to Labour Force Statistics, 2007 (cat. no. 6292.0)


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