{
  "slug": "tt008.gateway.value-density-import",
  "name": "Import value density by gateway",
  "unit": "usd_per_kg",
  "horizon": "long",
  "grade": "reported",
  "grade_means": "Counted and published by a named body.",
  "description": "Containerised import customs value per kg. A LEVEL, comparable across ports in the same month. Its MOVEMENT over time is not interpretable as a price change — at this aggregation a shift in the commodity mix moves it just as readily.",
  "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  "withdrawn": {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": "LEVEL ONLY, AND THE SERIES CANNOT SAY SO BY ITSELF. Comparable across ports in a given month; its movement over time is a mix index wearing a price label. Suspended until it is published together with the HS6 decomposition that separates the two.",
    "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, \"Import value density by gateway\" (retrieved 2026-08-06).",
  "licence": "CC BY 4.0",
  "retrieved_at": "2026-08-06T11:20:34.766Z",
  "urls": {
    "page": "https://trimtabist.com/series/tt008.gateway.value-density-import",
    "csv": "https://trimtabist.com/series/tt008.gateway.value-density-import.csv",
    "metadata": "https://trimtabist.com/series/tt008.gateway.value-density-import.metadata.json"
  }
}