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Jan 29 -- Today, the U.S. Census Bureau released the Detailed DHC-B Proof of Concept for the 2020 Census Detailed Demographic and Housing Characteristics File B (Detailed DHC-B) for public review and feedback. The Detailed DHC-B includes household type and tenure data for approximately 1,500 detailed racial and ethnic groups and American Indian and Alaska Native tribes and villages. This proof of concept illustrates the proposed 2020 Census data product design and disclosure avoidance settings using 2010 Census data. A 30-day public feedback period on the proof of concept concludes on Wednesday, Feb. 28, 2024.

What is the Detailed DHC-B?

-- Topics: Household type (e.g., family and nonfamily) and tenure (i.e., owner or renter occupied) data, including total household counts by householder race, ethnicity, or American Indian or Alaska Native (AIAN) tribe or village.
-- Groups: Improvements in questionnaire design, processing, and coding allow for the release of approximately 1,500 detailed racial and ethnic groups and AIAN tribes and villages. This includes tables for both detailed groups (disaggregated groups such as Puerto Rican, the Navajo Nation, Samoan, etc.), and regional groups (such as Caribbean Hispanic, American Indian, Polynesian, etc.).
-- Geographies: Nation, states, counties, census tracts, places, and American Indian/Alaska Native/Native Hawaiian (AIANNH) areas.  
-- Companion file to the Detailed DHC-A: The Detailed DHC-B is the companion file to the Detailed DHC-A. The Detailed DHC-A provides population counts and age and sex statistics for the same detailed groups and geographies; it was released in September 2023.
-- Data availability and adaptive design: The design ensures that only statistics that meet our accuracy and confidentiality standards are released. Adaptive design provides more granular statistics for larger populations and less granular statistics for smaller populations based on population thresholds for a given geography.
-- Planned release: September 2024.

The Detailed DHC-B Proof of Concept includes descriptions of what data users can expect to encounter in the 2020 Detailed DHC-B, including:

-- Detailed DHC-B Proof of Concept.
    o Table content and geographic availability.
    o Amount of data available for detailed and regional groups, how data are processed, accuracy of data, and data limitations.
-- Detailed Summary Metrics.
-- Tenure Examples resource.
-- Graphics: Adaptive Design Process and Adaptive Design Summary.
-- Privacy-Loss Budget Allocation resource.
-- Frequently Asked Questions (FAQ) resource.

The proof of concept does not include accompanying summary files or a full run of the 2010 Census data. Because this product is based on 2010 Census data, the increase in the amount of detailed race and ethnicity data that will be available in the 2020 Census Detailed DHC-B is not reflected in the proof of concept.

Detailed DHC-B Proof of Concept files: https://www2.census.gov/programs-surveys/decennial/2020/program-management/data-product-planning/2010-demonstration-data-products/05-Detailed-DHC-B/
Detailed DHC-B Timeline: https://www2.census.gov/programs-surveys/decennial/2020/program-management/Detailed-DHC-B-Timeline
Press release: https://www.census.gov/programs-surveys/decennial-census/decade/2020/planning-management/process/disclosure-avoidance/newsletters/detailed-dhc-b-proof-of-concept-released.html

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