Key points are not available for this paper at this time.
The Corruption Perceptions Index (CPI) has been developed since 1995 by Transparency International as a composite indicator that measures perceptions of corruption in the public sector in different countries around the world. It does so by aggregating different sources of corruption-related data that are produced by a variety of independent and well known institutions, such as the World Bank, the World Justice Project, the African Development Bank, the Economist Intelligence Unit and others.
Marcos et al. (Mon,) studied this question.