igoR

May 15, 2026 · View on GitHub

CRAN status CRAN results CRAN-Downloads r-universe R-CMD-check codecov CodeFactor DOI Lifecycle: stable status

igoR provides access to the Intergovernmental Organizations Database (v3) from the Correlates of War Project (Pevehouse et al. 2020).

The data set (V3) includes information on 534 IGOs from 1816 to 2014, as well as membership information.

The package also includes a distribution of the State System Membership data (Correlates of War Project 2017).

Installation

Install igoR from CRAN:

install.packages("igoR")

Check the documentation for the development version at https://dieghernan.github.io/igoR/dev/.

You can install the developing version from GitHub:

pak::pak("dieghernan/igoR")

Alternatively, you can install igoR using r-universe:

# Install igoR in R.
install.packages(
  "igoR",
  repos = c(
    "https://dieghernan.r-universe.dev",
    "https://cloud.r-project.org"
  )
)

Basic usage

Search an IGO by name

Search all IGOs related to “sugar”:

library(igoR)

result_sugar <- igo_search("Sugar")
ionumionameorgnamelongorgnamelabelsdatedeaddatedeadintegratedreplacedigocodeversionaccuracyofpre1965membershipdatessourcesandnotesimputedpoliticalsocialeconomic
40AMSCAfrican/Malgasy Sugar CouncilAfrican and Malagasy Sugar CouncilAfrican and Malagasy Sugar Council19661977100NA2.1Not applicable - created 1965 or later0001
1920GLACSECGroup of L/A & Carib. Sugar Exp. CountriesGroup of Latin American and Caribbean Sugar Exporting CountriesGroup of Latin American and Caribbean Sugar Exporting Countries19742001100NA2.3Not applicable - created 1965 or later0100
3130ISuCIntl Sugar CouncilInternational Sugar CouncilInternational Sugar Council19371967100913.0Within 5 years0010
4290SugUSugar UnionSugar UnionSugar Union19021913100293.0Completely accurate, except a few minor uncertainties0001

Table 1: IGOs related to sugar

IGO members

Composition of the European Economic Community over time:

eec_code <- igo_search("EEC", exact = TRUE)

# Get founding members.
eec_init <- igo_members(eec_code$ioname, year = eec_code$sdate)
ionameccodestatestatenmeyearvaluecategoryorgname
EEC210netherlandsNetherlands19581Full MembershipEuropean Economic Community
EEC211belgiumBelgium19581Full MembershipEuropean Economic Community
EEC212luxembourgLuxembourg19581Full MembershipEuropean Economic Community
EEC220franceFrance19581Full MembershipEuropean Economic Community
EEC260wgermanyGerman Federal Republic19581Full MembershipEuropean Economic Community
EEC325italyItaly19581Full MembershipEuropean Economic Community

Table 2: EEC, members (1958)

# Get members at the latest available date.
eec_end <- igo_members(eec_code$ioname)
ionameccodestatestatenmeyearvaluecategoryorgname
EEC200ukUnited Kingdom19921Full MembershipEuropean Economic Community
EEC205irelandIreland19921Full MembershipEuropean Economic Community
EEC210netherlandsNetherlands19921Full MembershipEuropean Economic Community
EEC211belgiumBelgium19921Full MembershipEuropean Economic Community
EEC212luxembourgLuxembourg19921Full MembershipEuropean Economic Community
EEC220franceFrance19921Full MembershipEuropean Economic Community
EEC230spainSpain19921Full MembershipEuropean Economic Community
EEC235portugalPortugal19921Full MembershipEuropean Economic Community
EEC255germanyGermany19921Full MembershipEuropean Economic Community
EEC325italyItaly19921Full MembershipEuropean Economic Community
EEC350greeceGreece19921Full MembershipEuropean Economic Community
EEC390denmarkDenmark19921Full MembershipEuropean Economic Community

Table 3: EEC, members (1992)

  • countrycode for converting country names and codes across different systems (ISO3, Eurostat, World Bank, UN, FIPS/GEC, etc.).
  • dplyr for data manipulation.

Citation

Hernangómez D (2026). igoR: Intergovernmental Organizations Database. doi:10.32614/CRAN.package.igoR. https://dieghernan.github.io/igoR/.

A BibTeX entry for LaTeX users:

@Manual{R-igoR,
  title = {{igoR}: Intergovernmental Organizations Database},
  doi = {10.32614/CRAN.package.igoR},
  author = {Diego Hernangómez},
  year = {2026},
  version = {1.0.1},
  url = {https://dieghernan.github.io/igoR/},
  abstract = {Tools to access and extract information from the Intergovernmental Organizations (IGO) Database (v3), provided by the Correlates of War Project <https://correlatesofwar.org/>. See also Pevehouse, J. C. et al. (2020) <doi:10.1177/0022343319881175>.},
}

References

Correlates of War Project. 2017. State System Membership List, V2016. https://correlatesofwar.org/data-sets/state-system-membership/.

Pevehouse, Jon CW, Timothy Nordstrom, Roseanne W McManus, and Anne Spencer Jamison. 2020. “Tracking Organizations in the World: The Correlates of War IGO Version 3.0 Datasets.” Journal of Peace Research 57 (3): 492–503. https://doi.org/10.1177/0022343319881175.