{
  "source": "U.S. Bureau of Economic Analysis",
  "empirical_scope": "Real GDP, United States, calendar 2024 Q1. Three archived headline growth estimates only. Not current GDP and not a fitted nowcast.",
  "reference_start": "2024-01-01",
  "reference_end": "2024-03-31",
  "unit": "Percent change from preceding quarter, seasonally adjusted annual rate",
  "estimate_stages": {
    "1": "advance",
    "2": "second",
    "3": "third within this extract; not final truth"
  },
  "release_time_evidence": "Three source headers say 08:30 EDT; timestamps converted to UTC. See gdp-source-receipts.json.",
  "availability_assumption": "Provider publication plus a specified constant collection delay, 0, 60 or 3600 seconds. This reconstructed archive does not establish actual historical ingestion times. Equality at the availability boundary is eligible.",
  "timestamp_format": "YYYY-MM-DDTHH:MM:SSZ, UTC, second resolution",
  "snapshot_key": "period and release_utc unique; most recent eligible release per period; duplicate keys rejected",
  "no_record": "Missing, not zero. No future backfill.",
  "controlled_inputs": {
    "controlled-release-ledger.csv": "Six authored monthly index records. Unit: index points. Forecast: mean of available January/February latest records for March. March target first=5, later=7. No empirical economic process fitted.",
    "information-worlds.csv": "Four equally weighted possibilities; Y=0,2,4,6, coarse signal=0,0,1,1. Unit: abstract outcome units."
  },
  "files": {
    "gdp-release-ledger.csv": {
      "sha256": "8fe907780f2aacea8b008aed7fbe7db291385874a73170c519bc9b8a0d0d2213",
      "rows": 3
    },
    "clock-origins.csv": {
      "sha256": "38c88289fafa90fbe9bb58be85286c64771c5705e516da5db2b095ae2a1b7a6a",
      "rows": 9
    },
    "controlled-release-ledger.csv": {
      "sha256": "08f46d878a14d14ba1fe44e30d73121816b11ca5f20cb5289bf903081e4e4589",
      "rows": 6
    },
    "information-worlds.csv": {
      "sha256": "1d9c8a95ddb41184cc91fa6bed38acd88091c532b2ebbf422a4c18018c167ad9",
      "rows": 4
    }
  },
  "extraction": "Three numerical values transcribed from the opening real-GDP headlines and cross-checked against raw PDF first pages. The three-stage comparison was inspected in the third release. No source pages or logos bundled.",
  "rights": {
    "bea_extract": "BEA information is public domain unless stated otherwise; https://www.bea.gov/help/faq/147. Source: U.S. Bureau of Economic Analysis.",
    "authored_code_text_figures": "Copyright 2026 Ian Helfrich; all rights reserved.",
    "alfred": "Documentation linked only; no ALFRED dataset or images bundled."
  },
  "case_status": "C02 release-ledger prerequisite implemented; larger real-time nowcast and latent-state case remains planned."
}