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Transparency International (TI) has published the Corruption Perceptions Index (CPI) since 1995, annually ranking countries "by their perceived levels of corruption, as determined by expert assessments and opinion surveys." The CPI generally defines corruption as "the misuse of public power for private benefit."〔CPI 2010: Long methodological brief, p. 2〕 The CPI currently ranks 177 countries "on a scale from 100 (very clean) to 0 (highly corrupt)." ==Methods== Transparency International commissioned Johann Graf Lambsdorff of the University of Passau to produce the Corruption Perceptions Index (CPI).〔(【引用サイトリンク】title=Frequently Asked Questions: TI Corruption Perceptions Index (CPI 2005) )〕 The 2012 CPI draws on 13 different surveys and assessments from 12 different institutions.〔CPI 2010: Long methodological brief, p. 1〕 The institutions are the African Development Bank, the Bertelsmann Foundation, the Economist Intelligence Unit, Freedom House, Global Insight, International Institute for Management Development, Political and Economic Risk Consultancy, Political Risk Services, the World Economic Forum, the World Bank and the World Justice Project. Countries must be assessed by at least three sources to appear in the CPI.〔CPI 2010: Long methodological brief, p. 7〕 The 13 surveys/assessments are either business people opinion surveys or performance assessments from a group of analysts.〔 Early CPIs used public opinion surveys.〔 The CPI measures perception of corruption due to the difficulty of measuring absolute levels of corruption. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Corruption Perceptions Index」の詳細全文を読む スポンサード リンク
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