Producer price indices volume 2002, Supplement 2
International guidelines and recommendations
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3.4 International guidelines and recommendations
There are no universally accepted international guidelines and recommendations for the compilation of PPIs. An overview of the steps involved in the compilation of PPIs is provided in the United Nations publication, Manual on Producers' Price Indices for Industrial Goods. 43 However, it should be emphasised that this manual only provides a detailed description of methodologies and best practice for the collection of price data and the compilation of PPIs. As the United Nations publication was drafted more than twenty years ago, the Inter-Secretariat Working Group on Price Statistics (IWGPS) formed the Technical Expert Group for Updating the Manual on PPI (TEG-PPI) to provide the IWGPS with technical advice on revision of the PPI Manual. The new manual is being co-ordinated with the development of the CPI manual referred to in Part 2.7 and, wherever appropriate, it reflects consistent content, terminology and methodology with the CPI manual. As with the CPI manual, it is expected that the PPI manual will be published in early 2003. 44 Following the adoption of European Council Regulation No. 1165/98 of 19 May 1998 concerning short-term statistics, EU Member States are required to collect total output prices, output prices of the domestic market and output prices of the non-domestic market (although if the latter is not available, it may be approximated by a unit value index). Although output prices consistent with the Regulation are not yet available for all Member States, it is anticipated that such data will be available in 2003. The Eurostat manual associated with the Regulation, Methodology of Industrial Short-term Statistics - Rules and Recommendations, contains methodological guidelines for output prices. 45 The major elements in the compilation of PPIs that impact on their international comparability are: • scope/coverage - PPI vs. WPI - activity versus product - domestic versus export market - gross output versus net sector weights • basic data - weighting data and frequency of weight revisions - establishment and product sample design and selection - frequency and timing - price collection methods - product specification - sample maintenance and rotation • index calculation - elementary aggregation - index aggregation - alignment of expenditure and price reference base - chaining re-weighted indices These elements are discussed below in the remaining sections of this Part. 43 Manual on Producers' Price Indices for Industrial Goods, Series M, No. 66, United Nations, New York, 1979. 44 Drafts of the manual can be viewed at http://www.imf.org/external/np/sta/tegppi/index.htm 45 See http://forum.europa.eu.int/irc/dsis/bmethods/info/data/new/embs/sts/part2d.html for an updated version of the output prices part of this publication. |
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