igo_members: Extract members of an IGO

In igoR: Intergovernmental Organizations Database

Extract members of an IGO

Description

Extract all the countries belonging to an IGO on a specific date.

Usage

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

Arguments

ioname	Any valid ioname of an IGO as specified on igo_year_format3. It can be also a vector of IGOs.
year	Year to be assessed, an integer or an array of years. If NULL the latest year available of the IGO will be extracted.
status	Character or vector with the membership status to be extracted. See Details on 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 datasets. 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 status
igo_members("ACCT", status = c("Associate Membership", "Observer")) %>%
  as_tibble()

# States no 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 countrycodes 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 Jan. 18, 2026, 1:06 a.m.