ggdc

Ggdc

Name: Ggdc
Creator: Ggdc

Metadata onlyLicense under review

Metadata only. This source’s license does not permit redistribution, so we catalog its metadata but do not re-serve the data. Use the provider link to obtain it under the original terms.

Coverage

Series catalogued

14,998

Temporal coverage

? – 2023-12-31

Licensing & provenance

License: License under review
Redistribution: Not permitted (metadata only)
Commercial use: Restricted / no
Modification: Permitted

How to cite

Groningen Growth and Development Centre (GGDC), University of Groningen - Maddison Project Database. Retrieved from https://www.rug.nl/ggdc/historicaldevelopment/maddison/. Compiled and redistributed by the Elkassabgi Data Library.

Processing: Retrieved from the official source, normalized to a long {series_key, obs_date, value} schema (period-start dates), de-duplicated, and stored as zstd Parquet. Compiled and redistributed by the Elkassabgi Data Library.

Access & mirrors

Download: Select & download ggdc series as CSV →
API: Get a free API key, then GET /v1/series/<id>.csv
Canonical landing: https://econdatalibrary.com/ggdc.html
Update cadence: irregular
Update strategy: overwrite if changed
Storage layout: multi-file under data/clean_full/ggdc/: pwt10.parquet, pwt11.parquet, maddison2020.parquet, maddison2023.parquet (all zstd). Schema: series_key prefixed by version ('PWT10:{var}:{ccode}', 'PWT11:...', 'MADDISON:...', 'MADDISON23:...'), obs_date(date32, Dec-31), value(float64). save() does one pq.write_table each (non-atomic).

Full description

GGDC (Groningen Growth and Development Centre) data ingest. Sources: Penn World Tables 10.0: URL: https://www.rug.nl/ggdc/docs/pwt100.xlsx 183 countries, 1950-2019, 48 macro/productivity variables Ref: Feenstra, Inklaar & Timmer (2015), AER Maddison Project Database 2020: URL: https://www.rug.nl/ggdc/historicaldevelopment/maddison/data/mpd2020.xlsx 169 countries, 1 AD–2018, GDP pc and population (2011 int'l $) Ref: Maddison Project Database 2020, Bolt & van Zanden (2020) Output: data/clean_full/ggdc/pwt10.parquet data/clean_full/ggdc/maddison2020.parquet Series key format: PWT10:{variable}:{countrycode} e.g. PWT10:rgdpe:USA MADDISON:{variable}:{countrycode} e.g. MADDISON:gdppc:CHN Run: python jobs/ingest_ggdc.py

Structured metadata

schema.org/Dataset (Google Dataset Search)

{
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  "@type": "Dataset",
  "name": "Ggdc",
  "description": "GGDC (Groningen Growth and Development Centre) data ingest. Sources: Penn World Tables 10.0: URL: https://www.rug.nl/ggdc/docs/pwt100.xlsx 183 countries, 1950-2019, 48 macro/productivity variables Ref: Feenstra, Inklaar & Timmer (2015), AER Maddison Project Database 2020: URL:…",
  "url": "https://econdatalibrary.com/ggdc.html",
  "identifier": "ggdc",
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  "publisher": {
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  "creator": {
    "@type": "Organization",
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  "keywords": [
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  "citation": "Groningen Growth and Development Centre (GGDC), University of Groningen - Maddison Project Database. Retrieved from https://www.rug.nl/ggdc/historicaldevelopment/maddison/. Compiled and redistributed by the Elkassabgi Data Library.",
  "sameAs": [
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  ],
  "usageInfo": "Metadata-only catalog entry. This source's license does not permit redistribution, so the data itself is not served here; use the provider link to obtain the data under its terms."
}

Croissant (ML-ready, schema.org JSON-LD)

{
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    "@language": "en",
    "@vocab": "https://schema.org/",
    "cr": "http://mlcommons.org/croissant/",
    "data": {
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      "@type": "@json"
    },
    "dataType": {
      "@id": "cr:dataType",
      "@type": "@vocab"
    },
    "sc": "https://schema.org/",
    "conformsTo": "dct:conformsTo",
    "dct": "http://purl.org/dc/terms/"
  },
  "@type": "sc:Dataset",
  "conformsTo": "http://mlcommons.org/croissant/1.0",
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  "url": "https://econdatalibrary.com/ggdc.html",
  "creator": {
    "@type": "sc:Organization",
    "name": "Ggdc"
  },
  "publisher": {
    "@type": "sc:Organization",
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  "citation": "Groningen Growth and Development Centre (GGDC), University of Groningen - Maddison Project Database. Retrieved from https://www.rug.nl/ggdc/historicaldevelopment/maddison/. Compiled and redistributed by the Elkassabgi Data Library.",
  "isAccessibleForFree": false,
  "usageInfo": "Metadata-only Croissant record; underlying data is not redistributed under this source's license."
}

Part of the Econ Data Library catalog · metadata generated 2026-07-14 from the central registry · browse all datasets