Political regime

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About this data

Political regime
Political regime of a country using the classification by the Episodes of Regime Transformation-project. It distinguishes between hardening autocracies (score 0), stable autocracies (score 1), liberalizing autocracies (score 2), eroding democracies (score 3), stable democracies (score 4), and deepening democracies (score 5).
Episodes of Regime Transformation (2024) – processed by Our World in Data
Last updated
May 1, 2024
Next expected update
May 2025
Date range

Sources and processing

This data is based on the following sources

This dataset captures 680 unique episodes of regime transformation (ERT) from 1900 to 2019.

These data provide novel insights into regime change over the past 120 years, illustrating the value of developing a unified framework for studying regime transformation. Such transformations, while meaningfully altering the qualities of the regime, only produce a regime transition about 32% of the time. The majority of episodes either end before a transition takes place or do not have the potential for such a transition (i.e. constituted further democratization in democratic regimes or further autocratization in autocratic regimes).

Retrieved on
May 1, 2024
This is the citation of the original data obtained from the source, prior to any processing or adaptation by Our World in Data. To cite data downloaded from this page, please use the suggested citation given in Reuse This Work below.
Edgell, Amanda B., Seraphine F. Maerz, Laura Maxwell, Richard Morgan, Juraj Medzi- horsky, Matthew C. Wilson, Vanessa A. Boese, Sebastian Hellmeier, Jean Lachapelle, Patrik Lindenfors, Anna Lührmann, and Staffan I. Lindberg. (2024). Episodes of Regime Transformation Dataset (v14.0). Varieties of Democracy (V-Dem) Project. Available at:

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How to cite this page

To cite this page overall, including any descriptions, FAQs or explanations of the data authored by Our World in Data, please use the following citation:

“Data Page: Political regime”, part of the following publication: Bastian Herre, Lucas Rodés-Guirao, Esteban Ortiz-Ospina and Max Roser (2013) - “Democracy”. Data adapted from VDEM. Retrieved from [online resource]
How to cite this data

In-line citationIf you have limited space (e.g. in data visualizations), you can use this abbreviated in-line citation:

Episodes of Regime Transformation (2024) – processed by Our World in Data

Full citation

Episodes of Regime Transformation (2024) – processed by Our World in Data. “Political regime” [dataset]. VDEM, “Episodes of Regime Transformation v14” [original data]. Retrieved July 14, 2024 from