The 20 top countries or regions that were ranked as having the lowest perceived levels of corruption were (note scale of 10 to 1): Also shown was a power-law dependence linking higher CPI score to higher rates of foreign investment in a country.Ĭorruption Perceptions Index table: # The researchers found a correlation between a higher CPI and higher long-term economic growth, as well as an increase in GDP growth of 1.7% for every unit increase in a country's CPI score. Research papers published in 20 examined the economic consequences of corruption perception, as defined by the CPI. In August 2009 I have informed Cobus de Swardt, Managing Director of TI, that I am no longer available for doing the Corruption Perceptions Index." Economic implications The original creator of the index, Johann Graf Lambsdorff, withdrew from work on the index in 2009, stating "In 1995 I invented the Corruption Perceptions Index and have orchestrated it ever since, putting TI on the spotlight of international attention. (Note that a lower rating on this scale reflects greater corruption, so that countries with higher RGDPs generally had less corruption.)Īlex Cobham of the Center for Global Development reported in 2013 that "many of the staff and chapters" at Transparency International, the publisher of the Corruption Perceptions Index, "protest internally" over concerns about the index. Īll three metrics also had a highly significant correlation with real gross domestic product per capita (RGDP/Cap) the Corruption Perceptions Index correlation with RGDP/Cap was the strongest, explaining over three fourths of the variance. ValidityĪ study published in 2002 found a "very strong significant correlation" between the Corruption Perceptions Index and two other proxies for corruption: black market activity and an overabundance of regulation. The CPI measures perception of corruption due to the difficulty of measuring absolute levels of corruption.
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