OECD: Explanation of Purchasing Power Parity and Statistics

Provided by the Organization for Economic Co-operation and Development (OECD), the FAQ site explains the often confusing Purchasing Power Parity (PPP). It shows how PPPs are calculated, the major uses of PPPs, the methodology used to prepare the PPP data, and when the statistics are updated and revised. The latest PPP results can be downloaded at http://stats.oecd.org under the Prices Purchasing Power Parities tab.