Corruption Perceptions Index (CPI)
ranks countries and territories by their perceived levels of public sector corruption, according to experts and business people. Launched in 1995, and with comparable data back to 2012, the CPI has been widely credited with putting the issue of corruption on the international policy agenda.
Global Corruption Barometer (GCB)
supplements the CPI by surveying
ordinary citizens around the world. Since its introduction in 2003, the world’s largest public survey on corruption has collected valuable data about the experiences and perceptions of tens of thousands of people.
You can find out more about each of these tools and their methodologies as well as access the data here: