igoR

igoR provides tools for searching, extracting and recoding 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 2017) 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 = {1.0.3},
  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. 2017. State System Membership List, V2016. https://correlatesofwar.org/data-sets/state-system-membership/.

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.