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The Corruption Perceptions Index (CPI) measures the perceived levels of public sector corruption in 180 countries and territories. A composite index, the CPI is based on 13 different expert and business surveys.

CPI Facts

• The CPI measures perceptions of public sector corruption
• The CPI is not intended to measure a country's progress over time. It is a snapshot of perceptions of corruption, using data published in the past two years
• The CPI is a survey of surveys, of experts and business persons, based both in the country and abroad.

The links below are to downloadable PDF files that provide details on the research methodology used to create the CPI.