How does the TI Global Corruption Barometer differ from the TI Corruption Perceptions Index?
The Barometer assesses the general public’s views of corruption, while the Corruption Perceptions Index (CPI) focuses on expert views. While the Barometer also addresses the experience of individuals (petty) corruption, the CPI reflects the perceptions of informed observers on corruption in the public sector and politics. Despite these differences, there is considerable correlation between the two surveys each year (The statistical correlation coefficient is 0.66 in 2007).