Union of Concerned Scientists Release Report on 2020 Census Data Accuracy

Union of Concerned Scientists Release Report on 2020 Census Data Accuracy

By EditorJul 30, 2021
Concerns about census data accuracy have lead experts to worry about "the potential undercounting of variousgroups in the country and how undercounts might affect federal funding allocation, redistricting efforts, and representation. The Union of Concerned Scientists released this report in July describing the possible effects that undercounting may have on specific populations. From the Report: ". . . worries include potential undercounting of Hispanic populations in many communities and of young children, as well as underestimates of population at the state level (Epstein and Medina 2021; O’Hare et al. 2020; Bahrampour,Rabinowitz, and Mellnik 2021). In this report, we seek to…
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Redistricting Data: What to Expect and When

Redistricting Data: What to Expect and When

By EditorJul 28, 2021
Director's Blog - BY DR. RON JARMIN, ACTING DIRECTOR: Since releasing the apportionment results in April, we’ve had several teams working hard on the next set of 2020 Census data — the redistricting data. These data play an important role in our democracy and will begin to illuminate the changes to the local and demographic makeup of our nation over the last decade. These data include the first sub-state population counts and demographic characteristics from the census, information that states typically use for redistricting — the process of redrawing electoral district boundaries based on where their populations have increased or…
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Resources Available to Prepare for the 2020 Census Redistricting Data Release

Resources Available to Prepare for the 2020 Census Redistricting Data Release

By EditorJul 28, 2021
Press Release- BY JAMES WHITEHORNE, CHIEF, REDISTRICTING DATA AND VOTING RIGHTS OFFICE: In a few weeks, we’ll release the 2020 Census redistricting data in our legacy summary file format. And a few weeks after that, we’ll release the same data in an easier-to-use format. We’re releasing the same data twice but in different formats at different times to make sure states get the data as quickly as possible. Acting Director Dr. Ron Jarmin explained these two releases in his blog, Redistricting Data: What to Expect and When. In this blog, I provide more detail about the formats and support materials available,…
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Census Bureau Moves Up Release of Demonstration Data to Coincide with August Redistricting Data Release

Census Bureau Moves Up Release of Demonstration Data to Coincide with August Redistricting Data Release

By EditorJul 23, 2021
Press Release (July 22, 2021): In response to stakeholder input about the value of earlier access to demonstration data that feature the 2020 Census Disclosure Avoidance System’s chosen production settings, the Census Bureau is moving up the release date for the demonstration data to coincide with the release (by August 16) of the legacy-formatted redistricting data. We’ll announce the specific release date in the coming weeks. The Census Bureau released metrics for the chosen production settings July 1 (see newsletter). We understand, based on your feedback, that access to the demonstration data coincident to the initial redistricting data release will…
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Census Bureau Sets Key Parameters to Protect Privacy in 2020 Census Results

Census Bureau Sets Key Parameters to Protect Privacy in 2020 Census Results

By EditorJun 09, 2021
The Census Bureau announced today the final framework for implementing its privacy algorithm (aka "disclosure avoidance or "differential privacy") on the 2020 census data. The specific settings (indicated below) determine the balance between accuracy and privacy in the data. In short, it determines how much statistical "noise" will be injected into the data. This decision comes after several notable criticisms of demonstration data that had been treated with the algorithm. Quick Info for Statistical Professionals: The latest set of demonstration data was set at an epsilon of 12.2. Today, the bureau's Data Stewardship Executive Policy Committee chose an epsilon of…
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Two Studies Find Major Issues with Soon to Be Released Census Data Due to Differential Privacy

Two Studies Find Major Issues with Soon to Be Released Census Data Due to Differential Privacy

By EditorMay 30, 2021
A team of researchers at Harvard University and a separate team at the University of Minnesota have published reports offering a troubling assessment of the U.S. Census Bureau's use of differential privacy or disclosure avoidance system (DAS) to block would-be hackers from identifying the personal information of everyone who participated in the 2020 census. In short, both conclude that the soon-to-be-released census data will not be accurate enough for redistricting. Read both studies here: Harvard Study. University of Minnesota Study. These reports and others are responses solicited by the Census Bureau in its effort to promote transparency and obtain feedback…
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U.S. Census Bureau VIDEO: Differential Privacy 101

U.S. Census Bureau VIDEO: Differential Privacy 101

By EditorMay 07, 2021
Watch this video for a basic eplanation of the differential privacy technique used to protect the privacy of individuals whose data resides in large databases. The video demonstrates how database records can be reconstructed to gain more detailed information on an individual beyond what exists in the one database. https://www.youtube.com/watch?v=Hsh1R1WA0kU
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Election Data Services Report Gives Context to 2020 Apportionment Results

Election Data Services Report Gives Context to 2020 Apportionment Results

By EditorMay 04, 2021
Every 10 years the U.S. Census apportionment numbers are presented and every 10 years Election Data Services (EDS) releases a comprehensive analysis of the apportionment numbers giving us a contextual view of what they mean and how the numbers affect electoral politics in the U.S. This year's EDS analysis is particularly intriguing. Here are some of the highlights. Read the full report here. States that Just Missed an Additional Seat and States that Just Barely Held on to an Existing Seat: Under the Equal Proportions method of apportionment (which has been in use since the early 20th century), each state…
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MALDEF: Civil Rights, Good Government Groups, and Experts, Decry Attempts to Use ACS Data as the Primary Basis for Redistricting

MALDEF: Civil Rights, Good Government Groups, and Experts, Decry Attempts to Use ACS Data as the Primary Basis for Redistricting

By EditorApr 30, 2021
A Mexican American Legal Defense and Educational Fund (MALDEF) press release denounces the use of survey data from the U.S. Census Bureau as an alternate basis to draw redistricting maps. Various civil rights organizations and experts have released a joint statement expressing concerns about the practice. Read the press release and statement below. PRESS RELEASE Washington, DC – Today, more than 55 civil and human rights groups and expert individuals released a statement to warn against inappropriate uses of data from the American Community Survey (ACS) for the purposes of redistricting. Led by Advancing Justice – AAJC, MALDEF (Mexican American Legal Defense and…
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