igoR

August 25, 2026 · View on GitHub

igoR provides tools for searching, extracting and recoding data from the Intergovernmental Organizations Database (version 3), distributed by the Correlates of War Project (Pevehouse et al. 2020).

The IGO-year data set contains 534 IGOs recorded from 1816 to 2014. The package also includes country-year membership data, state system data (Correlates of War Project 2025) and functions for deriving dyad-year joint membership results.

Source: Intergovernmental Organizations (version 3).
Documentation and vignettes at https://dieghernan.github.io/igoR/.

Note

This package is stable and maintained on a best-effort basis. I currently prioritize CRAN compatibility, bug fixes and regressions over new features.

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 development version from GitHub:

pak::pak("dieghernan/igoR")

Alternatively, you can install igoR using r-universe:

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

Basic usage

Search for IGOs by name

Search for IGOs related to “sugar”.

library(igoR)

result_sugar <- igo_search("Sugar")

ionum	ioname	orgname	longorgname	label	sdate	deaddate	dead	igocode	version	accuracyofpre1965membershipdates	political	social	economic
40	AMSC	African/Malgasy Sugar Council	African and Malagasy Sugar Council	African and Malagasy Sugar Council	1966	1977	1	NA	2.1	Not applicable - created 1965 or later	0	0	1
1920	GLACSEC	Group of L/A & Carib. Sugar Exp. Countries	Group of Latin American and Caribbean Sugar Exporting Countries	Group of Latin American and Caribbean Sugar Exporting Countries	1974	2001	1	NA	2.3	Not applicable - created 1965 or later	1	0	0
3130	ISuC	Intl Sugar Council	International Sugar Council	International Sugar Council	1937	1967	1	91	3.0	Within 5 years	0	1	0
4290	SugU	Sugar Union	Sugar Union	Sugar Union	1902	1913	1	29	3.0	Completely accurate, except a few minor uncertainties	0	0	1

Table 1: IGOs related to sugar

IGO members

Extract the members 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)

ioname	ccode	state	statenme	year	value	category	orgname
EEC	210	netherlands	Netherlands	1958	1	Full Membership	European Economic Community
EEC	211	belgium	Belgium	1958	1	Full Membership	European Economic Community
EEC	212	luxembourg	Luxembourg	1958	1	Full Membership	European Economic Community
EEC	220	france	France	1958	1	Full Membership	European Economic Community
EEC	260	wgermany	German Federal Republic	1958	1	Full Membership	European Economic Community
EEC	325	italy	Italy	1958	1	Full Membership	European Economic Community

Table 2: EEC members (1958)

# Get members in the latest available year.
eec_end <- igo_members(eec_code$ioname)

ioname	ccode	state	statenme	year	value	category	orgname
EEC	200	uk	United Kingdom	1992	1	Full Membership	European Economic Community
EEC	205	ireland	Ireland	1992	1	Full Membership	European Economic Community
EEC	210	netherlands	Netherlands	1992	1	Full Membership	European Economic Community
EEC	211	belgium	Belgium	1992	1	Full Membership	European Economic Community
EEC	212	luxembourg	Luxembourg	1992	1	Full Membership	European Economic Community
EEC	220	france	France	1992	1	Full Membership	European Economic Community
EEC	230	spain	Spain	1992	1	Full Membership	European Economic Community
EEC	235	portugal	Portugal	1992	1	Full Membership	European Economic Community
EEC	255	germany	Germany	1992	1	Full Membership	European Economic Community
EEC	325	italy	Italy	1992	1	Full Membership	European Economic Community
EEC	350	greece	Greece	1992	1	Full Membership	European Economic Community
EEC	390	denmark	Denmark	1992	1	Full Membership	European Economic Community

Table 3: EEC members (1992)

Recommended packages

countrycode package for converting country names and codes across systems, including ISO3, Eurostat, World Bank, UN and FIPS/GEC.
dplyr package for data manipulation.

Citation

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

For LaTeX users, a BibTeX entry is:

@Manual{R-igoR,
  title = {{igoR}: Access the Intergovernmental Organizations ({IGO}) Database},
  doi = {10.32614/CRAN.package.igoR},
  author = {Diego Hernangómez},
  year = {2026},
  version = {1.1.0},
  url = {https://dieghernan.github.io/igoR/},
  abstract = {Provides tools for searching, extracting and recoding the Intergovernmental Organizations (IGO) Database (version 3), distributed by the Correlates of War Project <https://correlatesofwar.org/>. Includes IGO-year and country-year membership data, state system data and functions for deriving dyad-year joint membership results. For a description of the data, see Pevehouse, J. C. et al. (2020) <doi:10.1177/0022343319881175>.},
}

References

Correlates of War Project. 2025. State System Membership, V2024. https://correlatesofwar.org.

Pevehouse, Jon C. W., 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.