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Large-Sample Bayesian Approximations for Privatized Data
[Submitted on 27 Apr 2026 (v1), last revised 13 Jul 2026 (this v · 2026-04-27 · via stat updates on arXiv.org

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Abstract:The increased use of differential privacy (DP) has allowed the sharing of large amounts of data while reducing the risk of disclosure of sensitive information at the individual level. However, the noise introduced by DP methods makes performing statistical inference more challenging. While various methods have been proposed to address different inferential tasks, they often require strong parametric assumptions and/or do not scale well with sample sizes (e.g. U.S. Census products). In response to these limitations, we propose an approximate Bayesian method to analyze privatized data products, which uses a two-step approach of imputing the confidential data and then sampling from the non-private posterior, and which is inspired by the method of Guha and Reiter (2025). We prove that this approximate sampler is asymptotically valid under mild assumptions. While this approach is motivated by Bayesian theory, we show through simulations that it provides conservative frequentist properties as well. We demonstrate the utility of our method by applying it in simulated settings as well as for an analysis on the drivers of homeownership via the 2022 American Community Survey.

Submission history

From: Jordan Awan [view email]
[v1] Mon, 27 Apr 2026 13:56:11 UTC (79 KB)
[v2] Mon, 13 Jul 2026 15:58:37 UTC (79 KB)