Create Panels of Independent States

Create panel data consisting of independent states from 1816 to the present. The package includes the Gleditsch & Ward (G&W) and Correlates of War (COW) lists of independent states, as well as helper functions for working with state panel data and standardizing other data sources to create country-year/month/etc. data.


states 0.2.1

  • plot_missing improvements: examples with Polity data, added a skip_labels option that will plot every n-th label for countries instead of all labels to avoid overplotting on the y-axis. The latter is inspired by
  • Added Polity combined score as example data set.
  • Fixed encoding issue for gwstates$country_names like Cote d'Ivoire and W├╝ttemberg.

states 0.2.0

  • Initial version on CRAN.
  • Refactor state_panel and add a partial option to allow including partial state-periods (as opposed to the default which is based on the exact start date, for all period resolutions in "by").
  • Rework plot_missing: fix a bug that would leave out independent states with no cases in the input data; add missing_info function that generates the data underlying the plots.
  • Add pkgdown website for states package documentation.

states 0.1.0

  • Initial version on Github.
  • Added a file to track changes to the package.

Reference manual

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0.3.1 by Andreas Beger, 8 months ago,

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Browse source code at

Authors: Andreas Beger [cre, aut]

Documentation:   PDF Manual  

MIT + file LICENSE license

Imports dplyr, rlang, methods, lifecycle

Suggests testthat, ggplot2, stringr, knitr, rmarkdown, covr, pkgdown, DT

See at CRAN