International Comparison Program
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The International Comparison Program (ICP) is a worldwide statistical partnership led by the World Bank under the auspices of the United Nations Statistical Commission. The ICP collects price and expenditure data from most of the world’s economies and estimates purchasing power parities (PPPs). It periodically publishes results including PPPs, the size of world economies, per capita measures and price levels, as well as details on the methodology employed by the program.