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v5

OpenAPI 3.1.0Proprietary2026-08-031,5423,1505.5 MB
Research

Single-variable Penn World Table time series for one country

Returns a lean (year, value) series for one Penn World Table variable for one ISO 3166-1 alpha-3 coded country. Useful for charting a single metric over time without pulling the full 47-column panel. The variable name must match a Penn World Table column exactly. Popular picks: rgdpo (output-side real GDP), rgdpe (expenditure side), cn (capital stock), hc (human capital index), ctfp (TFP level), labsh (labor share of income). Call /api/v1/research/pwt/definitions for the complete variable dictionary. Published under CC BY 4.0 with attribution to Penn World Table (Feenstra, Inklaar & Timmer, University of Groningen).

get/api/v1/research/pwt/country/{iso3}/{variable}

Path parameters

iso3string required

ISO 3166-1 alpha-3 country code. Case-insensitive; normalised to uppercase.

ISO 3166-1 alpha-3 country code. Case-insensitive; normalised to uppercase.

variablestring required

Penn World Table variable name (e.g. rgdpo, cn, hc, ctfp, labsh).

Penn World Table variable name (e.g. rgdpo, cn, hc, ctfp, labsh).

Query parameters

start_yearinteger nullable

Inclusive start year (integer). Panel range starts 1950.

Inclusive start year (integer). Panel range starts 1950.

end_yearinteger nullable

Inclusive end year (integer). Defaults to the latest year in the panel.

Inclusive end year (integer). Defaults to the latest year in the panel.

versionstring nullable

Release selector. pwt1100 (default) or pwt1001 (legacy).

Release selector. pwt1100 (default) or pwt1001 (legacy).

Response

Year-value pairs for one variable plus variable description and type.

Example response

{
  "data": {
    "version": "pwt1100",
    "countrycode": "USA",
    "country": "United States",
    "variable": "rgdpo",
    "type": "real-gdp-ppp",
    "observations": [
      {
        "year": 2020,
        "value": 20953.03
      }
    ],
    "count": 74,
    "start_year": 1950,
    "end_year": 2023
  },
  "meta": {
    "endpoint": "/api/v1/fred/us/cpi",
    "data_time": "2026-04-16T14:30:00Z",
    "response_time": "2026-04-16T14:30:12Z",
    "provider": "Sugra API v1.0.1",
    "source": "sugra_crypto",
    "attribution": "Short interest and Reg SHO daily short volume data is owned by and sourced from FINRA (Financial Industry Regulatory Authority).",
    "fallback_chain": [
      "sugra_crypto",
      "sugra_finance"
    ]
  }
}