Compare methods

	Corruption Perception Measurement	Transparency Index
Field	Public Administration	Public Administration
Family	Process / pipeline	Process / pipeline
Year of origin	1995	2006
Originator	Transparency International	Transparency International / International Budget Partnership
Type	Composite perception index	Composite governance index
Seminal source	Transparency International. Corruption Perceptions Index (CPI): methodology and annual results. Transparency International, Berlin.	Transparency International. Anti-corruption and transparency measurement resources. Transparency International, Berlin.
Aliases	Corruption Perceptions Index Method, Perceived Corruption Measurement, CPI Aggregation Method, Corruption Scoring	Government Transparency Index, Openness Index, Fiscal Transparency Index, Disclosure Index
Related	4	4
Summary	Corruption perception measurement quantifies how corrupt the public sector of a country is perceived to be, since actual corruption is hidden and cannot be observed directly. The canonical instrument, Transparency International's Corruption Perceptions Index (CPI), combines multiple independent expert assessments and business surveys into a single composite score per country. Each source is standardised onto a common scale and the rescaled scores are averaged, producing an index that ranks countries and tracks perceived integrity over time. The method explicitly reports uncertainty, echoing the aggregation logic of the World Bank's Worldwide Governance Indicators.	A transparency index is a composite measure that scores how openly a government discloses its decisions, finances and operations to citizens. By coding observable indicators — whether budget documents are published, whether access-to-information laws exist and are honoured, whether procurement and asset declarations are public — and aggregating them into a single normalised score, the index makes an abstract governance value comparable across jurisdictions and over time. Prominent operational examples include Transparency International's body of openness measures and the International Budget Partnership's Open Budget Index. Such indices anchor advocacy, conditionality and reform monitoring.