February 13, 2024: Please note that the deadline for comments on the Detailed Demographic and Housing Characteristics File B (Detailed DHC-B) Proof of Concept is February 28, 2024.

The U.S. Census Bureau values your feedback on the Detailed DHC-B Proof of Concept. We would like to understand how you or your work will be impacted (positively, negatively, or not at all) if we release the final Detailed DHC-B using the current proposal outlined in the proof of concept. Please provide the level of geography, description of the use case(s), and implications should the data be released as reflected in this proof of concept.

Please send feedback to 2020DAS@census.gov with the subject “2020 Census Detailed DHC-B.” If you do not want us to publish your feedback, or if you want us to remove your identifying information, please indicate that in the email.

We want to thank a data user who spotted two typos in the materials released on January 29: one in the Proof of Concept Appendix A and one in the Tenure Examples resource. We updated the files and posted an errata note describing the minor changes. All files are in the same FTP folder hosting all the Detailed DHC-B Proof of Concept materials. Please review the errata note to determine if the changes affect your analysis. The deadline for comments remains the same: February 28, 2024.

• January 29 Webinar: 2020 Census Race and Ethnicity Data: The Detailed DHC-B Proof of Concept (incl. Video | Transcript | Files)
• Detailed DHC-B Proof of Concept
• Detailed Summary Metrics
• Tenure Examples resource
• Graphics: Adaptive Design Process and Adaptive Design Summary
• Privacy-Loss Budget Allocation resource
• Frequently Asked Questions (FAQ) resource