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This document was added or updated on 12/02/2016.
The ACLD file contains all records from the 2006 Census sample, both those that were linked to a 2011 record and those that were not. Records that were linked have information for 2006 and 2011. Records that were not linked have information for 2006 only.
Data items for both 2006 and 2011 have a category labelled: unlinked record.
For 2011, the unlinked record category indicates the records from the 2006 Census that were not linked to a corresponding 2011 Census record. That is, these records have valid information for 2006 but none for 2011.
For 2006 data items, the unlinked record category is empty. It will take on a value in the future once the file has been augmented with an additional sample drawn from the 2011 Census. This will comprise children born and overseas arrivals between 2006 and 2011. It is designed to maintain the long-term viability of the ACLD and will be added as part of the third wave of the file which will incorporate the 2016 Census. Once this occurs, this category will indicate records for which there is valid information for 2011 but none for 2006.
Excluding Unlinked Records in TableBuilder
When using the weighted summation option in TableBuilder, no results will be returned for unlinked records in 2011 as weights were not applied to these records. Results will be returned if analysis is performed on unweighted data only. If desired, this category can be excluded from tables by ensuring that the 'unlinked record' category is deselected before each data item is added to the table. Such a table would produce a sample count corresponding to the equivalent table run with weights. Refer to the TableBuilder User Manual for more information on how to select data items for tables.
If the 'unlinked record' category is present on a data item that has already been added to a table, it can be removed by selecting this category within the relevant data item and then pressing the 'Remove from Table' button.
Note that removing any category, such as the 'unlinked record' category, from a table where data has already been generated will clear all data, meaning the table will need to be rerun.
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