The CPI is limited in scope, capturing perceptions of the extent of corruption in the public sector, from the perspective of business people and country experts.

Complementing this viewpoint and capturing different aspects of corruption, Transparency International produces a range of both qualitative and quantitative research on corruption, both at the global level from its Secretariat and at the national level through Transparency International’s network of National Chapters based in over 90 countries around the world.

Complementing the CPI, Transparency International’s other global research products include:

1. Global Corruption Barometer (GCB): Measuring people’s perceptions and experiences of corruption, the Global Corruption Barometer is a representative survey of more than 114,000 households in 107 countries. The most recent Global Corruption Barometer results (2013) can be found here. http://www.transparency.org/gcb2013/
2. Bribe Payers Index (BPI): Measuring the supply side of corruption in international business transaction, the Bribe Payers Index is a ranking of leading exporting countries according to the perceived likelihood of their firms to bribe abroad. It is based on a survey of business executives capturing perceptions of the business practices of foreign firms in their country. The most recent Bribe Payers Index can be found here. http://bpi.transparency.org/bpi2011/
3. Global Corruption Report (GCR): Exploring corruption issues in detail for a specific issue or sector, the Global Corruption Report is a thematic report which draws on a variety of expert research and analysis as well as case studies. The series of Global Corruption Reports, covering issues from the judiciary to education, can be found here. http://www.transparency.org/research/gcr
4. National Integrity System assessments (NIS): A series of in-country studies providing an extensive qualitative assessment of the strengths and weaknesses of the key institutions that enable good governance and prevent corruption in a country. For more information on the National Integrity System reports, please click here. http://www.transparency.org/whatwedo/nis
5. Transparency In Corporate Reporting: The study analyses the extent of transparency in the reporting on a series of anti-corruption measures by the world’s largest companies. For further information, please click here. http://www.transparency.org/whatwedo/pub/transparency_in_corporate_reporting_assessing_the_worlds_largest_companies