HomeMy WebLinkAbout071922 FW_ Updated 2010 Demonstration Data Metrics Reflect Correction of Inadvertent Coding Error
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From: U.S. Census Bureau
Sent: Tuesday, July 19, 2022 6:20:15 AM (UTC-08:00) Pacific Time (US & Canada)
To: Heidi Eisenhour
Subject: Updated 2010 Demonstration Data Metrics Reflect Correction of Inadvertent Coding Error
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ALERT: BE CAUTIOUS This email originated outside the organization. Do not open attachments or click on links if you are not expecting them.
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Updated 2010 Demonstration Data Metrics Reflect Correction of Inadvertent Coding Error
<https://lnks.gd/l/eyJhbGciOiJIUzI1NiJ9.eyJidWxsZXRpbl9saW5rX2lkIjoxMDAsInVyaSI6ImJwMjpjbGljayIsImJ1bGxldGluX2lkIjoiMjAyMjA3MTkuNjA5NjA5NzEiLCJ1cmwiOiJodHRwczovL3d3dy5jZW5zdXMuZ292L3Byb2dyYW1zLXN1cn
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<https://lnks.gd/l/eyJhbGciOiJIUzI1NiJ9.eyJidWxsZXRpbl9saW5rX2lkIjoxMDEsInVyaSI6ImJwMjpjbGljayIsImJ1bGxldGluX2lkIjoiMjAyMjA3MTkuNjA5NjA5NzEiLCJ1cmwiOiJodHRwczovL3d3dy5jZW5zdXMuZ292L3Byb2dyYW1zLXN1cn
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Updated 2010 Demonstration Data Metrics Reflect Correction of Inadvertent Coding Error
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July 18, 2022: The Census Bureau today released updated detailed summary metrics <https://lnks.gd/l/eyJhbGciOiJIUzI1NiJ9.eyJidWxsZXRpbl9saW5rX2lkIjoxMDIsInVyaSI6ImJwMjpjbGljayIsImJ1bGxldGluX2lkIjoiMj
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and Housing Characteristics File (DHC) (v. 2022-03-16) <https://lnks.gd/l/eyJhbGciOiJIUzI1NiJ9.eyJidWxsZXRpbl9saW5rX2lkIjoxMDMsInVyaSI6ImJwMjpjbGljayIsImJ1bGxldGluX2lkIjoiMjAyMjA3MTkuNjA5NjA5NzEiLCJ
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As discussed during the June Committee on National Statistics workshop <https://lnks.gd/l/eyJhbGciOiJIUzI1NiJ9.eyJidWxsZXRpbl9saW5rX2lkIjoxMDQsInVyaSI6ImJwMjpjbGljayIsImJ1bGxldGluX2lkIjoiMjAyMjA3MTku
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, we recently discovered an error in a configuration file used to apply privacy-loss budget parameters for the housing units file included in the demonstration data product. This configuration
error inadvertently reversed the order of privacy-loss budget (PLB) allocations by geographic level (see image below). The persons file included in the demonstration data product was
unaffected by the error.
<https://content.govdelivery.com/attachments/fancy_images/USCENSUS/2022/07/6181635/allocationerror_original.png>
We have corrected the code and those updates will be reflected in the second round of demonstration data slated for release in August <https://lnks.gd/l/eyJhbGciOiJIUzI1NiJ9.eyJidWxsZXRpbl9saW5rX2lkI
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. We have also updated the PLB allocation fact sheet <https://lnks.gd/l/eyJhbGciOiJIUzI1NiJ9.eyJidWxsZXRpbl9saW5rX2lkIjoxMDYsInVyaSI6ImJwMjpjbGljayIsImJ1bGxldGluX2lkIjoiMjAyMjA3MTkuNjA5NjA5NzEiLCJ1c
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actual allocations used. The August release will reflect significant updates to the disclosure avoidance system’s (DAS) parameters, driven by data user feedback and our own extensive
analysis. Your submitted use cases were instrumental in helping set the accuracy targets against which we are tuning the DAS’s parameters.
Since the PLB allocation error resulted in unintended shifts in the accuracy in the data, the corrections will cause shifts, as well.
The Census Bureau makes this commitment: in both the second demonstration data product and the final production run, the Census Bureau will maintain or improve the level of accuracy
for the vast majority of tabulations above the block level that were released with greater accuracy than intended in the March demonstration data product, provided that this level of
accuracy can be supported without undermining the overall confidentiality protections. Our ongoing confidentiality protection assessments will be important because disclosure risks
are highest for data published for very small geographies (especially for data published at the block level).
General Impact of the Allocation Error
In general, and as reflected in the updated metrics <https://lnks.gd/l/eyJhbGciOiJIUzI1NiJ9.eyJidWxsZXRpbl9saW5rX2lkIjoxMDcsInVyaSI6ImJwMjpjbGljayIsImJ1bGxldGluX2lkIjoiMjAyMjA3MTkuNjA5NjA5NzEiLCJ1cmw
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file had the following impact:
* U.S. and state-level tabulations in the demonstration product were significantly less accurate than intended.
* County-level tabulations in the demonstration product were slightly more accurate than intended.
* Tabulations for incorporated places in the demonstration product were comparable.
* Tract-level tabulations in the demonstration product were slightly less accurate than intended.
Again, the Census Bureau will ensure that accuracy levels above the block level in the upcoming data products meet or exceed the levels in the March demonstration data, consistent with
ongoing confidentiality assessments.
Per Procedure, an Independent External Code Review Will Precede Final Release
Although the algorithm behind the disclosure protections undergoes a thorough and independent external code review before going into final production, it doesn’t go through the same
level of review during development. Development involves multiple rapid-cycle code changes and experimental tuning runs to find the combination of settings that meet accuracy and confidentiality
needs.
Once the final settings are selected, we allot significant time in the production schedule for the independent external code peer review, as we did for the production code in the 2020
Census Redistricting Data (P.L. 94-171) Summary File release. That review is designed to identify any coding errors introduced during development.
Missed the CNSTAT Workshop? Slides and Video Now Online
Slides and video presentations from the June CNSTAT Workshop are now posted on the CNSTAT website <https://lnks.gd/l/eyJhbGciOiJIUzI1NiJ9.eyJidWxsZXRpbl9saW5rX2lkIjoxMDgsInVyaSI6ImJwMjpjbGljayIsImJ1b
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/141238835363-l> . The workshop featured multiple analyses by data users of the March 16, 2022, DHC demonstration data.
As always, please contact us via 2020DAS@census.gov <mailto:2020DAS@census.gov> if you have any questions.
________________________________
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Recent Posts re: Data Product Development and Release Plans: <https://lnks.gd/l/eyJhbGciOiJIUzI1NiJ9.eyJidWxsZXRpbl9saW5rX2lkIjoxMTAsInVyaSI6ImJwMjpjbGljayIsImJ1bGxldGluX2lkIjoiMjAyMjA3MTkuNjA5NjA5Nz
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* NEW: 2022-03-16 Detailed Summary Metrics, as Intended <https://lnks.gd/l/eyJhbGciOiJIUzI1NiJ9.eyJidWxsZXRpbl9saW5rX2lkIjoxMTEsInVyaSI6ImJwMjpjbGljayIsImJ1bGxldGluX2lkIjoiMjAyMjA3MTkuNjA5NjA5NzEiLCJ
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* NEW: Updated Privacy-loss Budget Allocation Fact Sheet <https://lnks.gd/l/eyJhbGciOiJIUzI1NiJ9.eyJidWxsZXRpbl9saW5rX2lkIjoxMTIsInVyaSI6ImJwMjpjbGljayIsImJ1bGxldGluX2lkIjoiMjAyMjA3MTkuNjA5NjA5NzEiLC
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Other Useful Links:
* Main FTP folder containing all 2020 Census demonstration data and detailed summary metrics <https://lnks.gd/l/eyJhbGciOiJIUzI1NiJ9.eyJidWxsZXRpbl9saW5rX2lkIjoxMTMsInVyaSI6ImJwMjpjbGljayIsImJ1bGxldG
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* 2020 Census Data Product Planning Crosswalk (v. 2022-03-16) <https://lnks.gd/l/eyJhbGciOiJIUzI1NiJ9.eyJidWxsZXRpbl9saW5rX2lkIjoxMTQsInVyaSI6ImJwMjpjbGljayIsImJ1bGxldGluX2lkIjoiMjAyMjA3MTkuNjA5NjA5N
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YXBoaWNfYW5kX0hvdXNpbmdfQ2hhcmFjdGVyaXN0aWNzLzIwMjItMDMtMTZfU3VtbWFyeV9GaWxlLzIwMjItMDMtMTZfMjAyMF9DZW5zdXNfRGF0YV9Qcm9kdWN0X1BsYW5uaW5nX0Nyb3Nzd2Fsay54bHN4P3V0bV9jYW1wYWlnbj0yMDIyMDcxOW1zZGVjczFjY2R
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* Summary of Public Feedback Received on the 2010 Demonstration Data Product - Demographic and Housing Characteristics File (2022-03-16) <https://lnks.gd/l/eyJhbGciOiJIUzI1NiJ9.eyJidWxsZXRpbl9saW5rX2
lkIjoxMTUsInVyaSI6ImJwMjpjbGljayIsImJ1bGxldGluX2lkIjoiMjAyMjA3MTkuNjA5NjA5NzEiLCJ1cmwiOiJodHRwczovL3d3dzIuY2Vuc3VzLmdvdi9wcm9ncmFtcy1zdXJ2ZXlzL2RlY2VubmlhbC8yMDIwL3Byb2dyYW0tbWFuYWdlbWVudC9yb3VuZF8xX
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* 2010 and 2020 Census Data Product Release Dates <https://lnks.gd/l/eyJhbGciOiJIUzI1NiJ9.eyJidWxsZXRpbl9saW5rX2lkIjoxMTYsInVyaSI6ImJwMjpjbGljayIsImJ1bGxldGluX2lkIjoiMjAyMjA3MTkuNjA5NjA5NzEiLCJ1cmwiO
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* 2020 Census Data Products: United States <https://lnks.gd/l/eyJhbGciOiJIUzI1NiJ9.eyJidWxsZXRpbl9saW5rX2lkIjoxMTcsInVyaSI6ImJwMjpjbGljayIsImJ1bGxldGluX2lkIjoiMjAyMjA3MTkuNjA5NjA5NzEiLCJ1cmwiOiJodHRw
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* Media Tip Sheet: Next 2020 Census Data Products to be Released in 2023 <https://lnks.gd/l/eyJhbGciOiJIUzI1NiJ9.eyJidWxsZXRpbl9saW5rX2lkIjoxMTgsInVyaSI6ImJwMjpjbGljayIsImJ1bGxldGluX2lkIjoiMjAyMjA3MT
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* Blog: 2020 Census Data Products: Next Steps for Data Releases <https://lnks.gd/l/eyJhbGciOiJIUzI1NiJ9.eyJidWxsZXRpbl9saW5rX2lkIjoxMTksInVyaSI6ImJwMjpjbGljayIsImJ1bGxldGluX2lkIjoiMjAyMjA3MTkuNjA5NjA
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* Blog: Plans for Producing Detailed Racial, Ethnic and Tribal Data from the 2020 Census <https://lnks.gd/l/eyJhbGciOiJIUzI1NiJ9.eyJidWxsZXRpbl9saW5rX2lkIjoxMjAsInVyaSI6ImJwMjpjbGljayIsImJ1bGxldGluX2
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* Graphical timeline, DHC Development <https://lnks.gd/l/eyJhbGciOiJIUzI1NiJ9.eyJidWxsZXRpbl9saW5rX2lkIjoxMjEsInVyaSI6ImJwMjpjbGljayIsImJ1bGxldGluX2lkIjoiMjAyMjA3MTkuNjA5NjA5NzEiLCJ1cmwiOiJodHRwczovL
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* Graphical timeline, Detailed DHC-A Development <https://lnks.gd/l/eyJhbGciOiJIUzI1NiJ9.eyJidWxsZXRpbl9saW5rX2lkIjoxMjIsInVyaSI6ImJwMjpjbGljayIsImJ1bGxldGluX2lkIjoiMjAyMjA3MTkuNjA5NjA5NzEiLCJ1cmwiOi
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* Recent JASON Group Report: Consistency of Data Products and Formal Privacy Methods for the 2020 Census <https://lnks.gd/l/eyJhbGciOiJIUzI1NiJ9.eyJidWxsZXRpbl9saW5rX2lkIjoxMjMsInVyaSI6ImJwMjpjbGljay
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VQW3D44GDCO0/s/1519389142/br/141238835363-l>
* Fact Sheet: Understanding Disclosure Avoidance-Related Variability in the 2020 Census Redistricting Data <https://lnks.gd/l/eyJhbGciOiJIUzI1NiJ9.eyJidWxsZXRpbl9saW5rX2lkIjoxMjQsInVyaSI6ImJwMjpjbGlj
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* 2020 Census Disclosure Avoidance Modernization Web Page <https://lnks.gd/l/eyJhbGciOiJIUzI1NiJ9.eyJidWxsZXRpbl9saW5rX2lkIjoxMjUsInVyaSI6ImJwMjpjbGljayIsImJ1bGxldGluX2lkIjoiMjAyMjA3MTkuNjA5NjA5NzEiL
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* Disclosure Avoidance Webinar Series <https://lnks.gd/l/eyJhbGciOiJIUzI1NiJ9.eyJidWxsZXRpbl9saW5rX2lkIjoxMjYsInVyaSI6ImJwMjpjbGljayIsImJ1bGxldGluX2lkIjoiMjAyMjA3MTkuNjA5NjA5NzEiLCJ1cmwiOiJodHRwczovL
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* Disclosure Avoidance System Updates <https://lnks.gd/l/eyJhbGciOiJIUzI1NiJ9.eyJidWxsZXRpbl9saW5rX2lkIjoxMjcsInVyaSI6ImJwMjpjbGljayIsImJ1bGxldGluX2lkIjoiMjAyMjA3MTkuNjA5NjA5NzEiLCJ1cmwiOiJodHRwczovL
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* Newsletter Archives <https://lnks.gd/l/eyJhbGciOiJIUzI1NiJ9.eyJidWxsZXRpbl9saW5rX2lkIjoxMjgsInVyaSI6ImJwMjpjbGljayIsImJ1bGxldGluX2lkIjoiMjAyMjA3MTkuNjA5NjA5NzEiLCJ1cmwiOiJodHRwczovL3d3dy5jZW5zdXMuZ
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________________________________
Contact Us <mailto:2020DAS@census.gov>
About Disclosure Avoidance Modernization
The Census Bureau is modernizing the protections that safeguard 2020 Census responses against emerging confidentiality threats. We rely on data user analysis and feedback to help us
develop statistical products that are relevant and statistically accurate yet comply with our confidentiality obligations. This involves making data-driven decisions about the scope
and precision of the census data we publicly release. We encourage you to visit our Disclosure Avoidance Modernization website <https://lnks.gd/l/eyJhbGciOiJIUzI1NiJ9.eyJidWxsZXRpbl9saW5rX2lkIjoxMjk
sInVyaSI6ImJwMjpjbGljayIsImJ1bGxldGluX2lkIjoiMjAyMjA3MTkuNjA5NjA5NzEiLCJ1cmwiOiJodHRwczovL3d3dy5jZW5zdXMuZ292L3Byb2dyYW1zLXN1cnZleXMvZGVjZW5uaWFsLWNlbnN1cy9kZWNhZGUvMjAyMC9wbGFubmluZy1tYW5hZ2VtZW50L3
Byb2Nlc3MvZGlzY2xvc3VyZS1hdm9pZGFuY2UuaHRtbD91dG1fY2FtcGFpZ249MjAyMjA3MTltc2RlY3MxY2NkdGFycyZ1dG1fbWVkaXVtPWVtYWlsJnV0bV9zb3VyY2U9Z292ZGVsaXZlcnkifQ.CGhXA1tKoY6UXcvp4sgAwV1nQCPvYrF7jrR6kVGPJHk/s/1519
389142/br/141238835363-l> to learn more.
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* Graphical timeline, Detailed DHC-A Development <https://lnks.gd/l/eyJhbGciOiJIUzI1NiJ9.eyJidWxsZXRpbl9saW5rX2lkIjoxMjIsInVyaSI6ImJwMjpjbGljayIsImJ1bGxldGluX2lkIjoiMjAyMjA3MTkuNjA5NjA5NzEiLCJ1cmwiOi
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* Recent JASON Group Report: Consistency of Data Products and Formal Privacy Methods for the 2020 Census <https://lnks.gd/l/eyJhbGciOiJIUzI1NiJ9.eyJidWxsZXRpbl9saW5rX2lkIjoxMjMsInVyaSI6ImJwMjpjbGljay
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VQW3D44GDCO0/s/1519389142/br/141238835363-l>
* Fact Sheet: Understanding Disclosure Avoidance-Related Variability in the 2020 Census Redistricting Data <https://lnks.gd/l/eyJhbGciOiJIUzI1NiJ9.eyJidWxsZXRpbl9saW5rX2lkIjoxMjQsInVyaSI6ImJwMjpjbGlj
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* 2020 Census Disclosure Avoidance Modernization Web Page <https://lnks.gd/l/eyJhbGciOiJIUzI1NiJ9.eyJidWxsZXRpbl9saW5rX2lkIjoxMjUsInVyaSI6ImJwMjpjbGljayIsImJ1bGxldGluX2lkIjoiMjAyMjA3MTkuNjA5NjA5NzEiL
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* Disclosure Avoidance Webinar Series <https://lnks.gd/l/eyJhbGciOiJIUzI1NiJ9.eyJidWxsZXRpbl9saW5rX2lkIjoxMjYsInVyaSI6ImJwMjpjbGljayIsImJ1bGxldGluX2lkIjoiMjAyMjA3MTkuNjA5NjA5NzEiLCJ1cmwiOiJodHRwczovL
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* Disclosure Avoidance System Updates <https://lnks.gd/l/eyJhbGciOiJIUzI1NiJ9.eyJidWxsZXRpbl9saW5rX2lkIjoxMjcsInVyaSI6ImJwMjpjbGljayIsImJ1bGxldGluX2lkIjoiMjAyMjA3MTkuNjA5NjA5NzEiLCJ1cmwiOiJodHRwczovL
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* Newsletter Archives <https://lnks.gd/l/eyJhbGciOiJIUzI1NiJ9.eyJidWxsZXRpbl9saW5rX2lkIjoxMjgsInVyaSI6ImJwMjpjbGljayIsImJ1bGxldGluX2lkIjoiMjAyMjA3MTkuNjA5NjA5NzEiLCJ1cmwiOiJodHRwczovL3d3dy5jZW5zdXMuZ
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________________________________
Contact Us <mailto:2020DAS@census.gov>
About Disclosure Avoidance Modernization
The Census Bureau is modernizing the protections that safeguard 2020 Census responses against emerging confidentiality threats. We rely on data user analysis and feedback to help us
develop statistical products that are relevant and statistically accurate yet comply with our confidentiality obligations. This involves making data-driven decisions about the scope
and precision of the census data we publicly release. We encourage you to visit our Disclosure Avoidance Modernization website <https://lnks.gd/l/eyJhbGciOiJIUzI1NiJ9.eyJidWxsZXRpbl9saW5rX2lkIjoxMjk
sInVyaSI6ImJwMjpjbGljayIsImJ1bGxldGluX2lkIjoiMjAyMjA3MTkuNjA5NjA5NzEiLCJ1cmwiOiJodHRwczovL3d3dy5jZW5zdXMuZ292L3Byb2dyYW1zLXN1cnZleXMvZGVjZW5uaWFsLWNlbnN1cy9kZWNhZGUvMjAyMC9wbGFubmluZy1tYW5hZ2VtZW50L3
Byb2Nlc3MvZGlzY2xvc3VyZS1hdm9pZGFuY2UuaHRtbD91dG1fY2FtcGFpZ249MjAyMjA3MTltc2RlY3MxY2NkdGFycyZ1dG1fbWVkaXVtPWVtYWlsJnV0bV9zb3VyY2U9Z292ZGVsaXZlcnkifQ.CGhXA1tKoY6UXcvp4sgAwV1nQCPvYrF7jrR6kVGPJHk/s/1519
389142/br/141238835363-l> to learn more.
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