Corruption Perceptions Index
Transparency International published its first Corruption Perceptions Index in 1995. This German registered association created a tool to score countries by their perceived levels of public sector corruption. The initial scale ran from ten down to zero, where lower numbers indicated higher corruption. Early versions relied heavily on public opinion surveys to gather data. Johann Graf Lambsdorff of the University of Passau commissioned the index for the organization. He sought to capture expert and business leader assessments of various corrupt practices. These included bribery, misuse of public funds, and nepotism within civil services. The methodology shifted significantly over time to improve consistency across years.
Since 2012, the index has used a scale from one hundred down to zero. A score of one hundred means very clean governance while zero indicates high corruption. Researchers now combine thirteen different surveys from twelve distinct institutions. These bodies include the African Development Bank based in Ivory Coast and the Bertelsmann Foundation located in Germany. Other contributors range from the Economist Intelligence Unit in the UK to the World Justice Project in the US. Each country must be evaluated by at least three sources to appear in the final ranking. The process involves rescaling all data points to a uniform zero to one hundred range. Statistical software calculates mean values and standard deviations for each source. Missing values are replaced using an impute command within STATA packages. The resulting index is a simple average of all available rescaled scores.
Research papers published in 2007 examined economic consequences tied to these perception scores. Findings showed a correlation between higher CPI scores and increased long-term economic growth. One study calculated that GDP growth rises by 1.7 percent for every single unit increase in a country's score. Another paper from 2020 confirmed this positive relationship specifically among Balkan countries. It determined that CPI affects GDP with a rate of 0.34. Conversely, a 2019 working paper emphasized that many previous studies used pre-2012 data which was difficult to compare over time. That newer analysis presented evidence showing corruption negatively associates with economic growth. Real per capita GDP decreased around 17 percent when the reversed CPI increased by one standard deviation. A separate thesis from 2013 investigated global connections between corruption and income inequality. Results revealed a robust positive association measured by the Gini coefficient.
Political scientist Dan Hough identified three major flaws in how the Index functions today. He argued that measuring perception rather than actual corruption reinforces existing stereotypes. The nature of corruption in rural Kansas differs vastly from city administration in New York yet the Index treats them similarly. Critics also note the Index ignores private sector corruption entirely. Well-publicized scandals like Libor or Volkswagen emissions are not counted as corrupt actions under these rules. Alex Cobham wrote in a 2013 Foreign Policy article that the index reflects an elite bias in popular perceptions. He stated it is hard to see justification for its continuing publication given these issues. Many staff members at Transparency International protest internally over concerns about the methodology. The original creator Johann Graf Lambsdorff withdrew from work on the index in 2009 stating he was no longer available.
Advanced economies of Northern Europe, North America, and Asia often top the rankings for public sector cleanliness. These nations generally possess well-functioning judicial systems and strong rule of law domestically. However their commitment to fighting corruption appears weak regarding international financial regulations. The CPI does not capture transnational corruption committed by companies from these countries. The Netherlands serves as a prime example despite holding a high score. That nation has a poor record of prosecuting companies that bribe foreign officials to win contracts. A report titled Exporting Corruption 2022 assessed enforcement of the OECD Anti-Bribery Convention across forty-three signatories. It found a significant decline in foreign bribery enforcement globally. Only two out of forty-seven countries now fall into the active enforcement category. No country remains exempt from bribery by its nationals or related money laundering activities.
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Common questions
When did Transparency International publish its first Corruption Perceptions Index?
Transparency International published its first Corruption Perceptions Index in 1995. Johann Graf Lambsdorff of the University of Passau commissioned the index for the organization to score countries by their perceived levels of public sector corruption.
What scale does the Corruption Perceptions Index use since 2012?
Since 2012, the Corruption Perceptions Index has used a scale from one hundred down to zero. A score of one hundred means very clean governance while zero indicates high corruption.
How much does GDP growth rise per unit increase in a country's Corruption Perceptions Index score?
One study calculated that GDP growth rises by 1.7 percent for every single unit increase in a country's score. Research papers published in 2007 examined economic consequences tied to these perception scores and found this correlation.
Who withdrew from work on the Corruption Perceptions Index in 2009?
The original creator Johann Graf Lambsdorff withdrew from work on the index in 2009 stating he was no longer available. Political scientist Dan Hough identified three major flaws in how the Index functions today including elite bias.
Which report assessed enforcement of the OECD Anti-Bribery Convention across forty-three signatories in 2022?
A report titled Exporting Corruption 2022 assessed enforcement of the OECD Anti-Bribery Convention across forty-three signatories. It found a significant decline in foreign bribery enforcement globally with only two out of forty-seven countries now falling into the active enforcement category.