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Speakers recall 2020 corrections, warn some pandemic‑era gaps may persist until 2030
Summary
Witnesses described post‑2020 corrections (including an accepted addition of roughly 6,000 Boston students via a post‑census group‑quarters review) and warned that pandemic‑era population shifts and reduced field offices during 2020 likely left unresolved local undercounts that the LUCA and 2030 operations must address.
State and UMass Donahue Institute witnesses at the Sept. 22 hearing reviewed corrective steps taken after the 2020 Census and emphasized remaining risks. UMass Donahue Institute program manager Susan Strait said state and local demographers successfully used a post‑census Group Quarters Review to add about 6,000 students to Boston's official population for post‑census annual estimates, although that change did not affect the apportionment decision released on the 2020 timeline. "We submitted for 6,000 students... and the Census Bureau did accept that submission," Strait said. Committee members pressed whether those post‑census additions would have changed congressional apportionment; Strait said the additions did not affect apportionment. She and other witnesses warned that other pocket undercounts — especially in rural areas with complex mailing addresses or seasonal populations — remain uncertain and may carry forward into the decade if not addressed in LUCA and follow‑up. Speakers also discussed operational changes during 2020 that may have reduced field canvassing (local Census field offices were closed or reduced), increasing reliance on in‑office change detection and third‑party data. Susan Strait said machine‑based change detection misses "under‑the‑roof conversions" and other hidden units, and that boots‑on‑the‑ground field canvassing remains important in tree‑covered or dense urban areas. Why it matters: several speakers noted the political and fiscal consequences of small differences. UMDI presented a widely cited estimate that Massachusetts' decennial count supports roughly $16 billion in federal population‑based funding per a George Washington University analysis — underscoring why a small number of missed units can have measurable fiscal consequences over a decade. Ending: state and local officials urged continued use of post‑census review programs where available, thorough LUCA participation, and robust field verification of high‑discrepancy blocks ahead of 2030.
