Elamir, Elsayed A. H. and Skinner, Chris J.
Record-level Measures of Disclosure Risk for Survey Microdata. Southampton, UK, Southampton Statistical Sciences Research Institute, 20pp.
(S3RI Methodology Working Papers, (M04/02) ).
Measures of disclosure risk at the record level have a variety of potential uses in statistical disclosure control for microdata. We propose a new record level measure of disclosure risk which is the probability that a unique match between a microdata record and a population unit is correct. For discrete key variables subject to no measurement error, we study this measure under the assumption of a Poisson model and a Poisson-gamma model. Moreover, we apply the approaches to a sample of microdata from the U.K. General Household Survey. The results indicate that the risk measure may be used to establish whether sample unique records are unique in the population.
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