{
  "reviewed": "2026-10-09",
  "scope": "Three foundation chapters. Controlled alert, meter, index and finite information models are authored teaching material. Chapter 3 includes a three-value archived BEA release-history audit; no empirical nowcast or paper replication is claimed.",
  "sources": [
    {
      "id": "pearl-glymour-jewell-2016-interventions",
      "authors": [
        "Judea Pearl",
        "Madelyn Glymour",
        "Nicholas P. Jewell"
      ],
      "title": "Causal Inference in Statistics: A Primer",
      "year": 2016,
      "edition": "First edition, confirmed on the chapter's copyright line",
      "location": "Section 3.1, printed pages 53\u201355",
      "url": "https://bayes.cs.ucla.edu/PRIMER/primer-ch3.pdf#page=1",
      "use": "Interventions replace an assignment equation while conditioning retains a selected observed subgroup; unchanged structural equations and background distributions are explicit assumptions.",
      "read_scope": "Section 3.1 text inspected; no claim of reading or reproducing the entire book",
      "rights": "Copyrighted book chapter. Link only; no chapter, page image, or long excerpt redistributed.",
      "replication_status": "Not a replication target; established conceptual source"
    },
    {
      "id": "hernan-robins-2020-whatif",
      "authors": [
        "Miguel A. Hern\u00e1n",
        "James M. Robins"
      ],
      "title": "Causal Inference: What If",
      "year": 2020,
      "location": "Chapters 1\u20133: causal effects, randomized experiments, observational studies",
      "url": "https://miguelhernan.org/whatifbook",
      "use": "Further reading on potential-outcome definitions and the comparisons required by an assignment design.",
      "read_scope": "Author's book page and publisher chapter structure inspected; no full-book reading claimed",
      "rights": "Author-hosted book access does not grant permission to redistribute its pages; link only.",
      "replication_status": "Not a replication target; established further reading"
    },
    {
      "id": "hansen-2010-measurement",
      "authors": [
        "Bruce E. Hansen"
      ],
      "title": "Econometrics",
      "year": 2010,
      "edition": "Manuscript revision January 10, 2010; verified title page",
      "location": "Chapter 11 opening, printed page 153, PDF page 160",
      "url": "https://users.ssc.wisc.edu/~xshi28/Econometrics_Hansen.pdf#page=160",
      "read_scope": "Title page and chapter 11 opening measurement-error example inspected; no full-book reading claimed",
      "use": "Established errors-in-variables reference; scalar derivation and controlled meter example authored here",
      "rights": "Linked manuscript; no pages or images redistributed",
      "replication_status": "Established conceptual source, no paper replication"
    },
    {
      "id": "nist-sp330-2019",
      "authors": [
        "National Institute of Standards and Technology"
      ],
      "title": "The International System of Units (SI), 2019 edition",
      "year": 2019,
      "location": "Section 2.3.4, Table 4, PDF page 31",
      "url": "https://nvlpubs.nist.gov/nistpubs/SpecialPublications/NIST.SP.330-2019.pdf#page=31",
      "read_scope": "Derived-unit section and Table 4 inspected",
      "use": "Joule as energy and watt as joules per second; chapter derives MWh-to-joule conversion",
      "rights": "Link only; no external figure or page image bundled",
      "replication_status": "Unit-definition source, not a replication target"
    },
    {
      "id": "bea-2024q1-advance",
      "authors": [
        "U.S. Bureau of Economic Analysis"
      ],
      "title": "Real GDP, 2024 Q1, advance estimate",
      "year": 2024,
      "location": "April 25 2024: release header and first real-GDP headline; third-release comparison table cross-check",
      "url": "https://www.bea.gov/news/2024/gross-domestic-product-first-quarter-2024-advance-estimate",
      "read_scope": "Archived HTML header/headline and raw PDF first page inspected; annual-rate convention inspected on advance PDF page 5. No full-table data reconstruction claimed.",
      "use": "Three-value headline extract, publication times, stage identity and explicit superseded status. Collection delay is an authored scenario.",
      "rights": "BEA public-domain statement unless stated otherwise: https://www.bea.gov/help/faq/147. Source: U.S. Bureau of Economic Analysis. No agency logos or PDF pages bundled.",
      "replication_status": "Observed release-ledger audit executed in three languages; real-time GDP nowcast and predictive-value estimation not completed."
    },
    {
      "id": "bea-2024q1-second",
      "authors": [
        "U.S. Bureau of Economic Analysis"
      ],
      "title": "Real GDP, 2024 Q1, second estimate",
      "year": 2024,
      "location": "May 30 2024: release header and first real-GDP headline; third-release comparison table cross-check",
      "url": "https://www.bea.gov/index.php/news/2024/gross-domestic-product-first-quarter-2024-second-estimate-and-corporate-profits",
      "read_scope": "Archived HTML header/headline and raw PDF first page inspected; annual-rate convention inspected on advance PDF page 5. No full-table data reconstruction claimed.",
      "use": "Three-value headline extract, publication times, stage identity and explicit superseded status. Collection delay is an authored scenario.",
      "rights": "BEA public-domain statement unless stated otherwise: https://www.bea.gov/help/faq/147. Source: U.S. Bureau of Economic Analysis. No agency logos or PDF pages bundled.",
      "replication_status": "Observed release-ledger audit executed in three languages; real-time GDP nowcast and predictive-value estimation not completed."
    },
    {
      "id": "bea-2024q1-third",
      "authors": [
        "U.S. Bureau of Economic Analysis"
      ],
      "title": "Real GDP, 2024 Q1, third estimate",
      "year": 2024,
      "location": "June 27 2024: release header and first real-GDP headline; third-release comparison table cross-check",
      "url": "https://www.bea.gov/news/2024/gross-domestic-product-third-estimate-corporate-profits-revised-estimate-and-gdp-industry",
      "read_scope": "Archived HTML header/headline and raw PDF first page inspected; annual-rate convention inspected on advance PDF page 5. No full-table data reconstruction claimed.",
      "use": "Three-value headline extract, publication times, stage identity and explicit superseded status. Collection delay is an authored scenario.",
      "rights": "BEA public-domain statement unless stated otherwise: https://www.bea.gov/help/faq/147. Source: U.S. Bureau of Economic Analysis. No agency logos or PDF pages bundled.",
      "replication_status": "Observed release-ledger audit executed in three languages; real-time GDP nowcast and predictive-value estimation not completed."
    },
    {
      "id": "alfred-download-help",
      "authors": [
        "Federal Reserve Bank of St. Louis"
      ],
      "title": "ALFRED Download Data Help",
      "url": "https://alfred.stlouisfed.org/help/downloaddata",
      "location": "Vintage Dates; Observations by Real-Time Period; Observations, Initial Release Only",
      "read_scope": "Named documentation sections inspected",
      "use": "Distinguish reference dates, date-level vintages and validity intervals; no intraday receipt time inferred.",
      "rights": "Documentation linked, not redistributed; no ALFRED dataset bundled.",
      "replication_status": "Documentation source; no ALFRED API replication or dataset execution claimed."
    },
    {
      "id": "bea-information-rights",
      "authors": [
        "U.S. Bureau of Economic Analysis"
      ],
      "title": "Are the information and data presented on the BEA web site copyright-protected?",
      "url": "https://www.bea.gov/help/faq/147",
      "read_scope": "Agency public-domain statement inspected",
      "use": "Rights basis for the attributed three-number release extract.",
      "rights": "Source statement retained; own text, code and original figures retain separate author rights.",
      "replication_status": "Rights source, not a replication."
    }
  ]
}