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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Time.com Article Lays Out the Case for Prison Gerrymandering Reform

Time.com Article Lays Out the Case for Prison Gerrymandering Reform

By EditorJul 05, 2021
Prison Gerrymandering is more an act of omission than commission in that it occurs as a result of the redistricting process unless a jurisdiction acts to reverse it. In the 10 years between the 2010 and 2020 redistricting cycle, nearly a dozen states have committed to rectifying what many advocates say is a distortion in representational rights as a result of counting prisoners as residents of the electoral districts they are incarcerated in as opposed to the districts they resided in prior. Time.com offers this recent article that describes the issue in practical terms and makes the case for nationwide…
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Duke University Prof. Will Discuss “Monte Carlo” Sampling Method for Fair Redistricting Maps

Duke University Prof. Will Discuss “Monte Carlo” Sampling Method for Fair Redistricting Maps

By EditorJul 03, 2021
Monte Carlo sampling is generally a numerical method of solving mathematical problems through random sampling. When applied to redistricting, many academics advocate its use either to ferret out extreme gerrymandering or to produce more fairly drawn maps in the first place. Professor of Mathematics Jonathan Christopher Mattingly of Duke University, will be discussing the Monte Carlo method in-depth as it applies to redistricting on July 20th as the I.E. Block Community Lecturer at the Society for Industrial and Applied Mathematics (SIAM) virtual annual meeting. Mattingly has served as an expert witness in several high-profile restricting cases, including the recent U.S. Supreme Court case…
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Supreme Court Upholds Arizona Voting Laws Against Sec. 2 Voting Rights Challenge in Brnovich

By EditorJul 01, 2021
The U.S. Supreme Court issued its opinion today overturning a lower court's decision striking down two Arizona voting laws under Section 2 of the Voting Rights Act of 1965. The two laws the court upheld restricted out-of precinct voting and certain ballot collection activities in Arizona. Many experts view this as a severe weakening of the Voting Rights Act's protections for minority voters. The Court did seem to distinguish its interpretation of Section 2 in this case, from how it is applied in minority vote dilution redistricting map cases. Read the opinion here. The two voting laws at issue require…
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Federal Court Rejects Alabama’s Census Lawsuit

By EditorJun 29, 2021
An Alabama federal district court has rejected the State of Alabama's lawsuit requesting that the U.S. Census Bureau refrain from using the differential privacy method to modify individual census responses and move up the release of census data. Read the opinion here. The case in all likelihood will be appealed directly to the U.S. Supreme Court. The court writes: "On March 10, 2021, the State of Alabama, Congressman Robert Aderholt, and two Alabama voters (collectively, “Plaintiffs”) brought this suit against the U.S. Department of Commerce (“the Department”), the U.S. Bureau of the Census (“the Bureau”), and certain federal officials (collectively,…
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MALDEF Challenges Democratic Drawn Illinois State Legislative Map Citing Legislature’s Use of Census Survey Data

By EditorJun 13, 2021
The Mexican American Legal Defense Fund has sued in federal court after the Illinois legislature passed and the governor enacted a state legislative district map drawn using 5 yr census survey data (ACS) in place of the actual population count from the 2020 census. Read the complaint here. The complaint contends that the General Assembly has yet to release the alleged populations of the individual representative and legislative districts in the enacted map. The map was drawn by the legislature using ACS data due to the late release of the traditional population data used for redistricting, which is not anticipated…
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Illinois Minority Leaders Challenge State Legislative Map Drawn with Census Survey Data

By EditorJun 13, 2021
On June 4, Democratic Governor J.B. Pritzker signed a state legislative district map drawn and approved by the Democratic majority in the legislature. The Senate and House minority leaders have in turn sued to have the map overturned in federal court on account of the data that was used for balancing population between districts was census 'survey' estimate data (from the American Community Survey (ACS)), and not the hard count data historically used for redistricting. Read the complaint here. The controversy stems from the months-long delay in delivery of redistricting population data by the Census Bureau due to the Covid-19…
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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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Connecticut Gov. Ned Lamont signs bill ending prison gerrymandering

Connecticut Gov. Ned Lamont signs bill ending prison gerrymandering

By EditorMay 29, 2021
Press release from the Prison Policy Initiative.   Connecticut becomes the 11th state to end the practice of prison gerrymandering. May 27, 2021 For Immediate Release – Yesterday, Connecticut Governor Ned Lamont signed a bill ensuring that people in state prisons will hereafter be counted as residents of their home addresses when new legislative districts are drawn. The new law makes Connecticut the eleventh state to end the practice known as prison gerrymandering, after Illinois passed its own bill earlier this year. The national movement against prison gerrymandering began in 2001 when the founders of the Prison Policy Initiative discovered that the sheer size of…
NEWS, Redistricting, Redistricting Prisoners,
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