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The Effect of Differential Privacy on Medicaid Participation Among Racial and Ethnic Minority Groups

Abstract

Objective

To investigate how county and state-level estimates of Medicaid enrollment among the total, non-Hispanic White, Non-Hispanic Black or African American, and Hispanic or Latino/a population are affected by Differential Privacy (DP), where statistical noise is added to the public decennial US census data to protect individual privacy.

Data sources

We obtained population counts from the final version of the US Census Bureau Differential Privacy Demonstration Products from 2010 and combined them with Medicaid enrollment data.

Study design

We compared 2010 county and state-level population counts released under the traditional disclosure avoidance techniques and the ones produced with the proposed DP procedures.

Data collection/extraction methods

Not applicable.

Principal findings

We find the DP method introduces error up to 10% into counts and proportions of Medicaid participation rate accuracy at the county level, especially for small subpopulations and racial and ethnic minority groups. The effect of DP on Medicaid participation rate accuracy is only small and negligible at the state level.

Conclusions

The implementation of DP to the 2020 Census can affect analyses of health disparities, and health care access and use among different sub-populations in the United States. The planned implementation of DP in other census-related surveys such as the American Community Survey can misrepresent Medicaid participation rates for small racial and ethnic minority groups. This can affect Medicaid funding decisions.

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Posted in: Journal Article Abstracts on 06/05/2022 | Link to this post on IFP |
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