Which has higher centralization of political power index, Bulgaria or Slovenia?

Slovenia, at 0.172 against 0.165 in Bulgaria as of 2025.

How many years of comparable data are there for Bulgaria and Slovenia?

222 years are reported by both, from 1804 to 2025.

Where does this data come from?

V-Dem (2026) – processed by Our World in Data, published as Centralization of Political Power Index. Statizoid refreshes it automatically from the source and publishes the full history for both places.

Bulgaria vs Slovenia: Centralization of Political Power Index

Bulgaria

0.165

in 2025

Slovenia

0.172

in 2025

Bulgaria rank

123rd

Slovenia rank

120th

Centralization of Political Power Index over time

Bulgaria
Slovenia

How they compare

Slovenia currently reports 0.172 against 0.165 in Bulgaria, a difference of 0.007.

The two have swapped places 8 times across 222 shared years of data; in 1804 it was Slovenia ahead.

Bulgaria ranks 123rd and Slovenia ranks 120th of 173 countries.

Across the 23 decades both report, Bulgaria averaged higher in 16 and Slovenia in 7.

Head to head by decade

Decade	Bulgaria	Slovenia	Difference	Ahead
1800s	0.925	0.947	0.022	Slovenia
1810s	0.925	0.947	0.022	Slovenia
1820s	0.925	0.947	0.022	Slovenia
1830s	0.925	0.947	0.022	Slovenia
1840s	0.925	0.919	0.006	Bulgaria
1850s	0.925	0.9243	0.0007	Bulgaria
1860s	0.9102	0.712	0.1982	Bulgaria
1870s	0.7861	0.271	0.5151	Bulgaria
1880s	0.5588	0.268	0.2908	Bulgaria
1890s	0.552	0.268	0.284	Bulgaria
1900s	0.529	0.268	0.261	Bulgaria
1910s	0.5269	0.3124	0.2145	Bulgaria
1920s	0.5373	0.6909	0.1536	Slovenia
1930s	0.5795	0.8097	0.2302	Slovenia
1940s	0.6977	0.8292	0.1315	Slovenia
1950s	0.8223	0.76	0.0623	Bulgaria
1960s	0.825	0.6949	0.1301	Bulgaria
1970s	0.825	0.6554	0.1696	Bulgaria
1980s	0.825	0.6081	0.2169	Bulgaria
1990s	0.169	0.1065	0.0625	Bulgaria
2000s	0.1409	0.1207	0.0202	Bulgaria
2010s	0.146	0.0901	0.0559	Bulgaria
2020s	0.1482	0.1378	0.0103	Bulgaria

Averages of every year both report within each decade.

Frequently asked questions

Which has higher centralization of political power index, Bulgaria or Slovenia?: Slovenia, at 0.172 against 0.165 in Bulgaria as of 2025.
What is the difference in centralization of political power index between Bulgaria and Slovenia?: 0.007, with Slovenia ahead.
How many years of comparable data are there for Bulgaria and Slovenia?: 222 years are reported by both, from 1804 to 2025.
How do Bulgaria and Slovenia rank globally for centralization of political power index?: Bulgaria ranks 123rd and Slovenia ranks 120th of 173 countries.
Where does this data come from?: V-Dem (2026) – processed by Our World in Data, published as Centralization of Political Power Index. Statizoid refreshes it automatically from the source and publishes the full history for both places.

Individual pages

About this data

Indicator: Centralization of Political Power Index
Source: V-Dem (2026) – processed by Our World in Data
Licence: CC BY 4.0 (Our World in Data)
Coverage: 176 places, 29,802 data points, 1789–2025
Last refreshed: 07 August 2026

Central estimate of the extent to which the executive is unconstrained by the legislature, judiciary, electoral management body, and other oversight.