The facilities — known collectively to the bureau as group quarters — were among the most difficult places to count people during the 2020 census because the pandemic forced colleges to shutter dorms and send students home, and nursing homes and other facilities restricted access in an effort to protect vulnerable residents from the virus. Bureau officials are confident that they have since filled in the gaps using a statistical method they consider reliable, though they acknowledge that the challenge was formidable.
Residents of 43,000 of the 227,000 occupied dorms, prisons, military barracks, homeless shelters, group homes and nursing homes remained uncounted as late as December, according to new documents and slide presentations released recently by the Census Bureau in a Freedom of Information Act lawsuit filed by a Republican redistricting advocacy group. The documents hint at the scope of the challenges the bureau faced in conducting the massive count in the midst of a global pandemic, an effort made more difficult by wildfires, hurricanes and attempts by the Trump administration to interfere with the census. Census Bureau official Barbara LoPresti said recently that data collected from group quarters accounted for a large share of irregularities the statistical agency encountered but the data processing “has not shown any critical errors in data collection that we could not fix.”
“Anomalies in processing aren’t errors, but they can turn into errors if we don’t evaluate them and fix them,” LoPresti told a virtual meeting of outside experts who are evaluating the quality of the 2020 census data. “Our quality (check) process was therefore working.” Fixing irregularities, though, forced the Census Bureau to delay the release of numbers used for divvying up congressional seats among states in a process known as apportionment. It also pushed back by five months the release of redistricting data used for redrawing congressional and legislative districts.
Though people living in group quarters account for a small share of the overall population — under 3% of the 331 million people living in the U.S. — any inaccurate information can have a big impact on college towns or areas with a large prison population or a military base. That in turn can diminish representation in Congress and the amount of federal funding they are eligible to receive. “Individual group quarters can be huge in some areas,” Connie Citro, a senior scholar at the Committee on National Statistics, said during the virtual meeting of outside experts. The Republican advocacy group, Fair Lines America Foundation, sued the Census Bureau for information about how the group quarters count was conducted, saying it’s concerned about its accuracy and wants to make sure anomalies didn’t affect the state population figures used for apportionment. The apportionment numbers were released by the Census Bureau in April, and the redistricting numbers used for drawing congressional and legislative districts are being made public next month.
The group quarters count is under added scrutiny this census because the Census Bureau, for the first time, decided in the middle of crunching numbers to use a last-resort statistical technique called imputation to fill in the data gaps for the dorms, nursing homes and prisons. The method has been used for some time to fill in missing information on individual households. “If the Census Bureau is permitted to conduct these sorts of methodology changes and implementations behind closed doors … electoral chaos may result from the states’ reliance on potentially defective numbers in conducting redistricting,” Fair Lines said in court papers. In addition to the 43,000 group quarter addresses that lacked data last December, another 3,500 addresses had counts that were implausible because they were listed as having zero people or were way too high, suggesting there were duplicates. Statisticians removed duplicates, such as college students who were counted at both their dorms and parents’ homes, the documents said.
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