A Latent Class Modeling Approach for Generating Synthetic Data and Making Posterior Inferences from Differentially Private Counts

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Michelle Nixon
Andres Barrientos
https://orcid.org/0000-0001-8196-7229
Jerome Reiter
https://orcid.org/0000-0002-8374-3832
Aleksandra Slavkovic

Abstract

Several algorithms exist for creating differentially private counts from contingency tables, such as two-way or three-way marginal counts. The resulting noisy counts generally do not correspond to a coherent contingency table, so that some post-processing step is needed if one wants the released counts to correspond to a coherent contingency table. We present a latent class modeling approach for post-processing differentially private marginal counts that can be used (i) to create differentially private synthetic data from the set of marginal counts, and (ii) to enable posterior inferences about the confidential counts. We illustrate the approach using a subset of the 2016 American Community Survey Public Use Microdata Sets and the 2004 National Long Term Care Survey.

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Nixon, Michelle, Andres Barrientos, Jerome Reiter, and Aleksandra Slavkovic. 2022. “A Latent Class Modeling Approach for Generating Synthetic Data and Making Posterior Inferences from Differentially Private Counts”. Journal of Privacy and Confidentiality 12 (1). https://doi.org/10.29012/jpc.768.
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