Producer price indices volume 2002, Supplement 2
Summary of main methodologies used
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- Summary of main methodologies used
Summary of main methodologies used
Canada Commodity specialists estimate quality differences based on product and market knowledge, taking into account information received from retailers and manufacturers. Hedonic techniques are used for computer equipment and are being investigated for clothing and other products. Option costs for cars. Expert collectors evaluate quality of clothing. Imputation used in other areas. Whenever a new product has gained a sufficient market share, a specification for the product is added to the pricing sample. Mexico Option costs for cars, electrical and electronic goods. Unit prices are computed for items sold by weights and linking. New goods are included at the time of the sample revision; replacement items are chosen by price collectors and controlled by officials. United States Various techniques are used such as imputation procedure or direct estimates and hedonics for clothing, PCs, rent and new houses. Production cost approach for cars plus some mean class imputation. When a specific variety is not available anymore in an outlet it is replaced by the closest one; new items are introduced when the sample is revised each year. Australia Overlap imputation in most areas. Option costs and expert panel for new cars. Adjustment for quality differences relies largely on external industry data. Decision regarding selection of replacement items after consultation. New products are included between weight updates via linking or splicing process. MEI Methodological Analysis - Supplement 2 © 2002 52 Table 9: Consumer prices: Methodology for treatment of quality changes (continued) Summary of main methodologies used Japan Production cost approach is widely used (changes in production costs provide information about the value of quality change). The option cost method is applied to motor vehicles; hedonic method to the compilation of the PCs indices. New items are added when the sample is revised every 5 years; if an item spreads quickly on the market it is included before the next revision. Korea For minor changes in quality a direct adjustment is made; for major changes the splicing or overlap method is used. New items are introduced once the weights are revised every 5 years. New Zealand Prices are adjusted so that no price change is shown that is related to the change in quality. If an item is permanently removed from sale in an outlet it will be priced in a similar outlet; if a similar item is clearly more popular it will be priced. Austria Overlap price method; judgmental adjustment method; option costs for new cars. New products selected with regard to demand, actuality and availability and new models are implemented as soon as they are available. Belgium Specific computations are used for a number of items such as cars, some agriculture or pharmaceutical products and services. A product that disappears is replaced by a similar product. Czech Republic Imputation of price change using the price change of a similar product. Linking method is used for the replacement of outdated items; new products are included once a year and weights are reallocated within the 4-digit group. Denmark Overlapping prices or "monthly matched model and chaining" are used if possible and appropriate. Explicit adjustments are made for rented accommodation. For replacement items, the nearest substitute or item with the largest sale is taken instead. Finland Collector assessment of value of quality change. CSO ensures consistency of assessments. Hedonics for cars. New items are included when weights are updated. France Specific methods are used for determining "pure" price movements on a constant-quality basis, when a product is eliminated and replaced by another during the year. Splicing except PCs (hedonics) and cars (option costs and production costs). New items introduced annually. Germany Consumer price index measures only genuine price changes and reflects a constant quality of goods. Option costs for cars. Greece Hungary Price Collectors are assigned the task of selecting products of the same quality. The representative items are revised every year. New items are introduced every year in December. When a product gains sufficient importance it is added to the pricing sample. Iceland No adjustments are made. Ireland Expert (trade association) assessment for new cars. Adjustment are made when size pack s change. Prices replace products that are no longer available; new products are included at each rebasing. Italy Option costs for cars, otherwise overlap imputation. The basket of goods and services is reviewed every year and maintained fixed all through the year. Luxembourg 53 Price Indices © 2002 Table 9: Consumer prices: Methodology for treatment of quality changes (continued) Download 465.51 Kb. Do'stlaringiz bilan baham: |
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