Analysis of information sources in references of the Wikipedia article "Corruption in El Salvador" in English language version.
To reflect the updates that have been made to the methodology, the CPI 2012 will henceforth be presented on a 0-100 scale. This is to clearly demonstrate that scores from the CPI 2011 and previous editions should not be compared with scores from 2012
Can country/territory scores in the 2011 CPI be compared to those in past indexes? The CPI is not designed to allow for country scores to be compared over time. This is because the index draws on a country's rank in the original data sources, rather than its score. A rank will always deliver only relative information – and therefore a ranking is a one off assessment. A country's rank in a given data source can change a) if perceptions of corruption in other countries included in that source change or b) if countries are added or removed from that data source.
