JSM 2004 - Toronto

Abstract #301621

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Activity Number: 79
Type: Contributed
Date/Time: Monday, August 9, 2004 : 8:30 AM to 10:20 AM
Sponsor: General Methodology
Abstract - #301621
Title: Comparing Matchers to Enhance Upstream Capture of Duplicates on the MAF
Author(s): Mark K. Moran*+
Companies: U.S. Census Bureau
Address: , , VA, 20164,
Keywords: record linkage ; MAF ; duplicate
Abstract:

The Master Address File (MAF) inventories addresses nationwide for the Decennial Census and various surveys. Expanding coverage sometimes introduces duplicates--costly in the field. Best practice catches duplicates upstream. While we currently prevent duplication via a sophisticated "matcher," the tool has never been compared to a commercial probabilistic matcher. Using an administrative records file, we compared how both matchers linked addresses to the MAF. To account for handling of units at same address (e.g., apartments), three samples were drawn from discrepant cases and masked for clerical review: one lacking units, another from identical units, and a third from unlike units. Clerical reviewers classified links as confirmed, rejected, or unresolved. We found strong overall agreement between matchers (98% of confirmed links), while 1% were uniquely linked only by the production matcher and another 1% uniquely linked only by the probabilistic matcher. Similar results held in the unit absent universe, as well as in the equals universe. Unlike units, as expected, had smaller proportions of consensus.

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