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DRIFT

Statistics Directorate    
Definition:
An index is said to “drift” if it does not return to unity when prices in the current period return to their levels in the base period. Chain indices may drift when prices fluctuate over the periods they cover.

Also known as “chain-linking bias.”.

Source Publication:
ILO, IMF, OECD, Eurostat, UNECE, World Bank, 2004, Producer Price Index Manual: Theory and Practice, International Monetary Fund, Washington DC.

Hyperlink:
http://www.imf.org/external/np/sta/tegppi/index.htm

Statistical Theme: Prices and purchasing power partities

Created on Monday, February 17, 2003

Last updated on Friday, July 08, 2005