Purchasing power parity - Methodology
Detail methodological explanation about calculation of Purchasing Power Parities is available in Eurostat and OECD Manual “Eurostat-OECD Methodological Manual on Purchasing Power Parities, 2012 edition”.
The methodology can be downloaded from the following link: http://ec.europa.eu/eurostat/web/products-manuals-and-guidelines/-/KS-RA-12-023.