Definition: Fisher type PPP
Purchasing power parities
The PPP (Purchasing power parity) for a basic heading or an aggregate between two countries that is defined as the geometric mean of the Laspeyres type PPP and the Paasche type PPP for the basic heading or the aggregate. See also "Laspeyres type PPP" and "Paasche type PPP" because their formulation depends on whether they are being used to calculate basic heading PPPs or to aggregate basic heading PPPs.
Eurostat, Organization for Economic Cooperation and Development (OECD), "Eurostat-OECD Methodological Manual on Purchasing Power Parities", Publications Office of the European Union, Luxembourg, 2012