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AUTOMATED DATA LINKING
ADL uses Freely Extensible Biomedical Record Linking (FEBRL) software developed at the Australian National University. A number of different linking runs will be used to compare PES and Census records, each focused on a slightly different combination of name, addresses and demographic variables.
Potential links are assessed by assigning weights that reflect the level of agreement on selected data items from the two records. Large positive weights indicate probable matches, while large negative weights are observed for probable non-matches.
Important to the effective use of ADL is a series of processes that are run after ADL output is obtained. The Collect, Analyse, Reduce, De-duplicate and Systematise (CARDS) process identifies and rates the most plausible links from each ADL run for all PES respondents. The process then combines the links from all ADL runs and removes any duplicates.
While ADL is the next step in the evolution and continual improvement of PES processing, it is important to note that ADL cannot entirely replace the clerical decision-making process that has previously been at the core of PES processing. Clerical judgment will always be required to resolve the more complex or ambiguous cases and be used as a means of quality assuring automated processes.
To clerically confirm or reject potential person links identified by ADL, it is efficient to handle links for all persons in the same PES dwelling, so as to examine the entire household and their corresponding Census form at the same time. For this reason the CARDS process concludes by creating dwelling links and assigning Dwelling Link Ratings (DLR), to determine which PES dwellings will be examined by the PES Match and Search System (MSS), and which can be confirmed as links without further review. Person-level links are grouped together according to the dwelling they were found in PES, and dwelling-level links are derived and rated on the basis of the number and quality of person-level links identified between the PES and Census dwellings.
PES uses three Dwelling Link Ratings:
All PES dwellings with either Silver or Tin links are sent for clerical review. A small percentage of Platinum links are also clerically reviewed for quality assurance purposes.
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