{
  "slug": "tt008.commodity.unit-value-hs6",
  "name": "Unit value within commodity line (HS6)",
  "unit": "usd_per_kg",
  "horizon": "long",
  "grade": "reported",
  "grade_means": "Counted and published by a named body — for this ledger, the US Census Bureau. We mirror it and keep every revision.",
  "description": "Containerised customs value per kg inside a FIXED HS6 line, which is the only level at which a change can be read as being about the goods rather than the mix. HS6 is also the deepest level common to both directions — imports publish to HS10, exports only to HS6. Lines under 50 tonnes in a month are excluded as too thin to carry a ratio. Call it unit value, never quality.",
  "instrument": {
    "id": "TT-008",
    "name": "Port ledger",
    "clock": "medium",
    "role": "witness",
    "source": "US Census Bureau, intltrade/imports/porths",
    "source_url": "https://api.census.gov/data/timeseries/intltrade/imports/porths"
  },
  "coverage": {
    "from": "2024-01",
    "to": null
  },
  "publishable_ranges": [],
  "status": "suspended",
  "withdrawn": {
    "since": "1970-01-01",
    "until": null,
    "reason": "COVERAGE INCOMPLETE. HS6 is fetched on demand, not as a standing archive — it is roughly 12.6x the rows of HS2 and the full history would exceed the free disk. The archive currently holds a single HS6 month for two ports. Lift when the intended window is present for the ports a claim is about, verified by a month count per port.",
    "finding": null
  },
  "citation": "Trimtabist TT-008 Port ledger, from US Census Bureau porths. Containerised customs value divided by containerised shipping weight. NOT a price index: Census discontinued its own unit-value indices in 1989 for composition bias. Method: portledger/METHOD.md. Grade: reported.",
  "citationShort": "Trimtab TT-008 Port ledger, \"Unit value within commodity line (HS6)\" (retrieved 2026-08-07).",
  "licence": "CC BY 4.0",
  "retrieved_at": "2026-08-07T13:45:05.258Z",
  "urls": {
    "page": "https://trimtabist.com/series/tt008.commodity.unit-value-hs6",
    "csv": "https://trimtabist.com/series/tt008.commodity.unit-value-hs6.csv",
    "metadata": "https://trimtabist.com/series/tt008.commodity.unit-value-hs6.metadata.json"
  }
}