igo_members: Extract members of an IGO

In igoR: Access the Intergovernmental Organizations Database

Extract members of an IGO

Description

Extract all countries that belong to an IGO on a specific date.

Usage

igo_members(ioname, year = NULL, status = "Full Membership")

Arguments

ioname	Any valid ioname for an IGO as specified in igo_year_format3. This can also be a vector of IGOs.
year	Year to assess, as an integer or vector of years. If NULL, the latest year available for the IGO is extracted.
status	Character or vector with the membership status to be extracted. See Details in state_year_format3.

Value

A data.frame.

Source

Codebook Version 3 IGO Data for full reference.

References

Pevehouse, J. C., Nordstrom, T., McManus, R. W., & Jamison, A. S. (2020). Tracking organizations in the world: The Correlates of War IGO Version 3.0 data sets. Journal of Peace Research, 57(3), 492–503. \Sexpr[results=rd]{tools:::Rd_expr_doi("10.1177/0022343319881175")}.

See Also

igo_year_format3, igo_search(), state_year_format3.

Examples

library(dplyr)
igo_members("EU", year = 1993) %>% as_tibble()
igo_members("EU") %>% as_tibble()
igo_members("NAFTA", year = c(1995:1998)) %>% as_tibble()

# Extract different statuses.
igo_members("ACCT", status = c("Associate Membership", "Observer")) %>%
  as_tibble()

# States that are not members of the UN.
igo_members("UN", status = "No Membership") %>%
  as_tibble()

# Vectorized.
igo_members(c("NAFTA", "EU"), year = 1993) %>%
  as_tibble() %>%
  arrange(state)

# Use the countrycode package to get additional codes.
if (requireNamespace("countrycode", quietly = TRUE)) {
  library(countrycode)
  EU <- igo_members("EU")
  EU$iso3c <- countrycode(EU$ccode, origin = "cown", destination = "iso3c")

  EU$continent <- countrycode(EU$ccode,
    origin = "cown",
    destination = "continent"
  )

  tibble(EU)
}

igoR documentation built on May 23, 2026, 5:08 p.m.