Producer price indices volume 2002, Supplement 2
Summary of main methodologies used
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Summary of main methodologies used
Netherlands Effects of quality changes are eliminated from the index using quantifiable characteristics, specialist judgements, and overlap prices. Option costs for cars with imputation for full model changes. Option costs for PCs. New products are introduced into the index at base year revisions. Norway Imputation procedures are used to reflect quality differences. New products are introduced and old products retrieved once a year. Poland Products with substantial quality changes are treated as new ones; minor changes are not considered. New products are introduced when they have reached a sufficient share in the market. Portugal Adjustment for quality changes by overlap prices. New products are introduced when there is enough information to decide upon their inclusion and re-weighting. Slovak Republic Adjustment for quality differences is taken into account when replacement of the product is planned: a parallel price survey is conducted for the product with new specification. New products are determined through the results of the annual household budget survey. Spain Several techniques are used for quality changes; hedonic techniques are currently being investigated for some products. The list of products is reviewed every year (since January 2002). Sweden Quality adjustments are made when a forced substitution is performed; price collectors judgement for most goods; hedonics for clothing; expert panel for cars. New products are introduced continuously and old products removed. Switzerland Small quality changes are not taken into account. Prices are adjusted for substantial quality change where differences can be quantified, otherwise products considered as totally new ones and linked into the index. List of varieties is reviewed continuously and new products included according to specific rules. Turkey No adjustments are made. United Kingdom Option costs for new cars and PCs. Imputation in all other areas. List of new products is reviewed in January of each year; New products are included and old products removed. Download 465.51 Kb. Do'stlaringiz bilan baham: |
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