{
  "retrieval_date": "2026-07-13",
  "policy": "Latest official releases verified as of retrieval date; observation period is labeled separately from publication edition.",
  "sources": [
    {
      "id": "census-acs-2024-pums-person",
      "publisher": "U.S. Census Bureau",
      "title": "2024 ACS 1-Year PUMS Person CSV",
      "observation_period": "2024 ACS reference period / residence one year ago",
      "release_context": "2024 ACS 1-year product; 2024 state-to-state tables released January 21, 2026",
      "url": "https://www2.census.gov/programs-surveys/acs/data/pums/2024/1-Year/csv_pus.zip",
      "sha256": "afdc6d90c6e2f0bab365ed32d95ba4c4d8ac651162f46ac7861295b2dc469894",
      "bytes": 602847146,
      "unit": "weighted people",
      "limitations": "Survey estimates; sampling error; excludes movers whose prior residence cannot be mapped to a U.S. state/DC."
    },
    {
      "id": "census-acs-2024-pums-housing",
      "publisher": "U.S. Census Bureau",
      "title": "2024 ACS 1-Year PUMS Housing CSV",
      "observation_period": "2024",
      "url": "https://www2.census.gov/programs-surveys/acs/data/pums/2024/1-Year/csv_hus.zip",
      "sha256": "8281008e53de98f0ef81e7a2ee5a8725991dda1ecfd2713ead73246425e515d0",
      "bytes": 251500587,
      "unit": "housing records",
      "limitations": "Used only to verify/join current geography; person file also contains STATE."
    },
    {
      "id": "census-acs-2024-pums-dictionary",
      "publisher": "U.S. Census Bureau",
      "title": "2024 PUMS Data Dictionary",
      "observation_period": "2024",
      "url": "https://www2.census.gov/programs-surveys/acs/tech_docs/pums/data_dict/PUMS_Data_Dictionary_2024.pdf",
      "sha256": "929c2752995b0af1c16d5c64de8cdc43b4aa7d388ee2d45b4b4df90fecce1dff",
      "bytes": 395086,
      "unit": "documentation"
    },
    {
      "id": "census-pep-v2025-components",
      "publisher": "U.S. Census Bureau",
      "title": "Annual and Cumulative Estimates of Components of Resident Population Change, Vintage 2025",
      "observation_period": "July 1, 2024 to July 1, 2025",
      "url": "https://www2.census.gov/programs-surveys/popest/tables/2020-2025/state/totals/NST-EST2025-COMP.xlsx",
      "sha256": "8ffe58efe33b0642379fcd3fe180ef756934a96807d1e978a674a1f4b3c61c42",
      "bytes": 20364,
      "unit": "people",
      "limitations": "Net domestic migration estimates are components of population estimates, not gross corridor flows."
    }
  ],
  "derived": [
    {
      "file": "state_to_state_flows_2024.csv",
      "sha256": "1cf660aac1180f4635efa6c6da9a58ae1c257d22380edfb49333e737eb4b1591",
      "method": "Sum PWGTP by MIGSP origin and STATE destination; exclude same-state, abroad, Puerto Rico and unmapped records. 90% MOE = 1.645 \u00d7 sqrt(4/80 \u00d7 sum((replicate-main)^2))."
    },
    {
      "file": "state_net_domestic_migration_2025.csv",
      "sha256": "1591d09ffc0bdcb7833002eb01020cd0c3f5ffd0f8ccaae69ed5e90aa8da6832",
      "method": "Direct extraction of annual July 1, 2024 to July 1, 2025 columns from NST-EST2025-COMP."
    }
  ]
}