Free and fair elections vs. Political corruption
Holds up after adjusting for income
Across 168 countries, Free and fair elections and Political corruption rise and fall together at r = -0.78 (on a scale from −1 to +1, where 0 means no link). It holds up almost unchanged when only countries with similar income (GDP per person) are compared (r = -0.65, q = 0.022, allowing for the many pairs tested).
Comparing countries across the middle half of free and fair elections, 0.233 to 0.872 points, political corruption is better by 0.439 points at the top of that range than the bottom. Comparing only countries with similar national income, the gap is 0.337 points.
Link before adjusting (r)-0.776p = 5.5e-35 · 168 countries
After adjusting for national income-0.646p = 4.4e-21 · likely range [-0.73, -0.55]
p, allowing for regions0.001standard error 0.111 · 7 regions
Check for luck (q)0.022across 12,497 pairs
How to read these.r runs from −1 (one goes up as the other goes down) to +1 (they rise together), and 0 means no link. Adjusting for national income means comparing countries with the same GDP per person, so differences in wealth can’t explain the link. Income is used in percentage terms, since an extra $1,000 means more to a poor country than to a rich one. p is how likely a link this strong would be if there were really none. Below 0.05 means it is unlikely to be chance. Very small values are written in short form: 1.1e-32 means a decimal point followed by 31 zeros and then 11, so very close to zero. The likely range is where the true figure probably lies, and a range that crosses zero means the link could easily be chance. Countries in the same region tend to resemble each other, so the third figure allows for that, which gives a fairer p. The standard error is the typical size of the error in r. Finally, testing this many pairs means some will look strong by luck alone. A q below 0.05 means this link is unlikely to be one of those.
Free and fair elections · index (0-1)link with income +0.61 · high
Political corruption · index (0-1)link with income -0.68 · high
Both of these rise and fall closely with national income, so a strong link between them before adjusting was close to certain. Read the adjusted figure, not the first one.
“Link with income” is how closely each measure tracks GDP per person across countries, from −1 to +1.
Every country as a dot
best-fit line line after adjusting
Four ways to measure the link
| Method | r | p | Countries |
|---|---|---|---|
| Standard (Pearson), not adjusted | -0.776 | 5.5e-35 | 168 |
| By rank (Spearman), not adjusted | -0.798 | 2.6e-38 | 168 |
| Standard (Pearson), adjusted for national income | -0.646 | 4.4e-21 | 168 |
| By rank (Spearman), adjusted for national income | -0.660 | 3.2e-22 | 168 |
The rank version uses only each country’s place in line, from lowest to highest, so a few extreme countries count for less. The adjusted and unadjusted versions use the same 168 countries: those that report both measures and GDP per person. So the gap between them comes from the adjustment, not from a change in which countries are counted. Drop in the size of r after adjusting: +0.130 (a minus sign means it grew).
How solid is it?
Leaving out one country at a time, r ranges from -0.663 (without BFA) to -0.636 (without RUS). The bar above shows that range on a scale from −1 to +1, with the solid line at the full result. The single country that moves r most: BFA (-0.017).
Within each region
Countries are not separate, unrelated cases, and neighbors share a lot. A link that holds inside each region is far more believable than one that shows up only when comparing regions.
| n | r | ||
|---|---|---|---|
| East Asia & Pacific | 21 | -0.74 | |
| Europe & Central Asia | 49 | -0.77 | |
| Latin America & Caribbean | 23 | -0.58 | |
| Middle East, North Africa, Afghanistan & Pakistan | 21 | -0.49 | |
| Sub-Saharan Africa | 46 | -0.63 |
By income third
If the link shows up only in the richest third of countries, it is a feature of rich countries, not a general pattern.
| n | r | ||
|---|---|---|---|
| Poorest third | 56 | -0.65 | |
| Middle third | 56 | -0.65 | |
| Richest third | 56 | -0.72 |
By largest religious group
Countries grouped by a label they share, such as main religion, rather than by a number. Groups of fewer than twelve countries are not shown. These groups differ in income, region and history all at once. So a gap between them is a place to start asking questions, not an answer.
| n | r | ||
|---|---|---|---|
| Christians | 99 | -0.66 | |
| Muslims | 48 | -0.37 |
By last european coloniser
Countries grouped by a label they share, such as main religion, rather than by a number. Groups of fewer than twelve countries are not shown. These groups differ in income, region and history all at once. So a gap between them is a place to start asking questions, not an answer.
| n | r | ||
|---|---|---|---|
| France | 25 | -0.56 | |
| Never a European colony | 21 | -0.53 | |
| Spain | 19 | -0.45 | |
| United Kingdom | 49 | -0.75 |
Without outliers (countries far outside the middle half of countries on either measure, by more than one and a half times the width of that middle half): r = -0.646 after dropping 0 countries.
Two series, one country
Both measures over the years for one country you pick. The two charts are stacked so they share only the years along the bottom.
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Over time, within countries
Everything above compares countries with each other at one moment. This section compares each country only with itself over 36years. So a link here can’t come from anything about a country that stays the same, such as its history, geography, institutions or culture.
The link shows up within countries over time (r = -0.370) but mostly disappears in year-to-year changes (r = -0.104). That points to slow trends particular to each country, not the two measures moving together from year to year.
Across countries (adjusted)-0.646for comparison
Within countries-0.351each country vs itself
…and vs the same year elsewhere-0.370q = 0.000 · 175 countries
Year-on-year changes-0.104q = 0.065
Read with care.
- Almost all of the second indicator's variation is between countries, so the within-country estimate rests on a small part of the data.
- The association is much weaker in year-on-year changes than in levels, which points to shared country-specific trends.
6,227 country-years (one country in one year), 175 countries, 1990–2025, about 36 years each on average. Share of the variation that happens within countries over time: 15% for Free and fair elections, 7% for Political corruption. The margins of error allow for each country appearing many times, and for each year’s value being close to the year before.
Year-to-year changes are a cautious test, not a final answer. Looking only at changes from one year to the next removes each country’s own trends. But it also makes measurement mistakes louder, which pulls the results toward zero. A near-zero result here is weak evidence of no link, not proof.
With one measure years behind the other
Same year (lag 0): -0.370. A peak away from zero does not show which comes first. These series change slowly — this year’s value is close to last year’s. That makes the curve smooth and nearly symmetric, whatever produced the data. Even a sharp peak at one lag (a gap of some years) would not prove that one measure changes the other.
The data
index (0-1) | index (0-1) | Years | |
|---|---|---|---|
| Belgium BEL | 0.968 | 0.031 | 2025 |
| Norway NOR | 0.966 | 0.01 | 2025 |
| Australia AUS | 0.962 | 0.029 | 2025 |
| Finland FIN | 0.961 | 0.031 | 2025 |
| Denmark DNK | 0.961 | 0.004 | 2025 |
| Germany DEU | 0.957 | 0.024 | 2025 |
| Spain ESP | 0.956 | 0.113 | 2025 |
| Chile CHL | 0.956 | 0.075 | 2025 |
| New Zealand NZL | 0.954 | 0.014 | 2025 |
| Netherlands NLD | 0.954 | 0.027 | 2025 |
| Estonia EST | 0.952 | 0.025 | 2025 |
| Uruguay URY | 0.947 | 0.055 | 2025 |
| Sweden SWE | 0.945 | 0.009 | 2025 |
| Italy ITA | 0.945 | 0.157 | 2025 |
| Ireland IRL | 0.945 | 0.032 | 2025 |
Coppedge, M. et al., V-Dem Dataset, Varieties of Democracy (V-Dem) Project
Coppedge, M. et al., V-Dem Dataset, Varieties of Democracy (V-Dem) Project
Sources
Free and fair elections
Free and fair elections index
V-Dem Institute, University of Gothenburg · via Our World in Data · CC BY 4.0 · updated annual
Whether elections are run without voter-registration fraud, widespread irregularities, government threats against the opposition, vote buying or election violence. This asks a narrower question than whether a country is a democracy, and one that is easier to answer. A state can run clean elections while barring the opposition from standing. It can also run dirty elections and still change government. It is the clean-elections part of the electoral democracy index. So its pair with that index, and with liberal and participatory democracy, is built from the same numbers and flagged as such.
Political corruption
Political corruption index
V-Dem Institute, University of Gothenburg · via Our World in Data · CC BY 4.0 · updated annual
Expert ratings of corruption across the government, parliament, courts and public sector. It runs the opposite way to the Corruption Perceptions Index, where higher means cleaner. So the two should move strongly in opposite directions. V-Dem is also one of the datasets Transparency International combines into that index.
How this was computed
Data used: most recent value in 2010-2025; values come from 2025. To adjust for income, each measure is first predicted from GDP per person (in percentage terms, on a log scale) with a straight-line fit. Only what is left over is then compared. This is called a partial correlation. The line is drawn the standard way (ordinary least squares), which picks the line that comes closest to all the countries at once. The error margins allow for countries in the same region resembling each other, using 7 World Bank regions. The q-value corrects for testing all 12,497 pairs at once, using the Benjamini–Hochberg method. Underlying data last updated DYB 2024. How the country data works · explore Free and fair elections and Political corruption
This page shows that two measures go together. It does not show that Free and fair elections changes Political corruption, or the reverse. These figures also describe countries, not individual people. See the ecological fallacy.
More links with Free and fair elections or Political corruption
- Political corruption vs Rule of law before -0.87 → after adjusting -0.77
- Free and fair elections vs Women's political empowerment before +0.78 → after adjusting +0.72
- Political corruption vs Voice and accountability before -0.81 → after adjusting -0.69
- Liberal democracy vs Political corruption before -0.78 → after adjusting -0.68
- Free and fair elections vs Rule of law before +0.78 → after adjusting +0.65
- Government effectiveness vs Political corruption before -0.81 → after adjusting -0.64
- Political corruption vs Regulatory quality before -0.80 → after adjusting -0.62
- Civil liberties (FH) vs Political corruption before +0.73 → after adjusting +0.60