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4.2 FUTURE LINKAGE
Following the completion of processing for the 2016 Census, the ACLD (including the augmentation to maintain a 5% sample), will be enhanced further, by linking to the 2016 Census. The main difference for this linkage will be the use of a Silver linking method. Under this approach, personal and demographic information will be used for linkage, but the process will also utilise an encrypted, numeric version of name which is non-identifiable to an individual and is grouped with several other name combinations. It is anticipated that the encrypted numeric code will improve the number and quality of records linked.
The findings from the Information paper: Assessing the Likely Quality of the Statistical Longitudinal Census Dataset (cat. no. 1351.0.55.026) indicate that a Silver linkage method could potentially achieve between a 5 and 10 percentage point increase in the linkage rate. These estimates are indicative only as the time period between the Census Dress rehearsal and the Census was only one year, whereas the five year time gap between Censuses adds to the complexity of linking records for the ACLD.