A Roadmap for Disclosure Avoidance in the Survey of Income and Program Participation (2024) / Chapter Skim
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Appendix C: Technical Details for Differential Privacy Table Builder
Appendix C: Technical Details for Differential Privacy Table Builder
Pages 213-216
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From page 213... ...
. Table C-1 displays examples of Discrete Laplace perturbation probability vectors when the sensitivity Δu is 1 for the internal cells of the table.
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This is at tained by a simple sum of the microdata key among cell members. • Query consistency -- Across multiple users using the same query path (e.g., same specification for universe definition and requested table)
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For continuous variables, such as sums, averages, quantiles, and correlations, one can use the same concept of the microdata keys to obtain the same perturbations, but more research is required on how this is actually implemented in a differentially private setting. In a non-differentially private setting, one can add multiplicative noise to the statistic by multiplying the statistic by (1 + p)
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