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  • Articles and reports: 62F0014M1998006
    Geography: Canada
    Description:

    Statistical agencies such as Statistics Canada are investigating the use of scanner data for their own purposes. Interest has grown in the potential uses of this data to improve the quality of price indexes. This paper reports on initial research done in Prices Division. The paper looks at scanner data and the feasibility of its use to produce CPI estimates; evaluates current CPI methodology and procedures; and the impact that use of scanner data would have on the CPI commodity indexes. The main focus of the study, however, is to explore the impact that scanner data would have on the CPI basic commodity indexes covered by scannable items. Since the CPI criterion relates to a limited selection of scanner data, an examination will be made of the impact of gradually relaxing the criteria to include more products and outlets from the scanner data. The initial subset was derived by applying the CPI criteria of volume selling brands and outlets. Each of these changes in criteria yielded a different subset of scanner data. Calculations were performed using these various subsets of scanner data and their results compared to the CPI. An analysis of the results will be used in determining the strengths and limitations of CPI data, detect any deficiencies and provide information for revision of pricing selection.

    Release date: 1999-05-13

  • Articles and reports: 62F0014M1998012
    Geography: Canada
    Description:

    This paper examines the methods of adjustment for quality change made in the Canadian Consumer Price Index for the period 1989 to 1994. It finds that in most cases the current Canadian practice ensures that the replacement of one commodity by another, one variety of a commodity by another, or one outlet by another, has no impact on the overall index. The main exceptions to this result occur when replacing varieties of commodities that are purchased only occasionally, and a judgement is made that the quality ratio between the old and new variety is not the same as the ratio of their prices. In these cases there is an impact on the index, up or down, depending on whether the change in price reported is higher or lower than the change in quality. From the experience of the CPI in these six years there has been a correlation between the price ratio of a variety and its replacement and the index movement that derives from the judgement. The direction and size of the impact on the index depends largely on whether an item is replaced with a higher or lower priced item. For these reasons, the paper argues that more attention should be paid to ensuring that the item selection is more representative of current sales than has traditionally been the case.

    Release date: 1999-05-13
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  • Articles and reports: 62F0014M1998006
    Geography: Canada
    Description:

    Statistical agencies such as Statistics Canada are investigating the use of scanner data for their own purposes. Interest has grown in the potential uses of this data to improve the quality of price indexes. This paper reports on initial research done in Prices Division. The paper looks at scanner data and the feasibility of its use to produce CPI estimates; evaluates current CPI methodology and procedures; and the impact that use of scanner data would have on the CPI commodity indexes. The main focus of the study, however, is to explore the impact that scanner data would have on the CPI basic commodity indexes covered by scannable items. Since the CPI criterion relates to a limited selection of scanner data, an examination will be made of the impact of gradually relaxing the criteria to include more products and outlets from the scanner data. The initial subset was derived by applying the CPI criteria of volume selling brands and outlets. Each of these changes in criteria yielded a different subset of scanner data. Calculations were performed using these various subsets of scanner data and their results compared to the CPI. An analysis of the results will be used in determining the strengths and limitations of CPI data, detect any deficiencies and provide information for revision of pricing selection.

    Release date: 1999-05-13

  • Articles and reports: 62F0014M1998012
    Geography: Canada
    Description:

    This paper examines the methods of adjustment for quality change made in the Canadian Consumer Price Index for the period 1989 to 1994. It finds that in most cases the current Canadian practice ensures that the replacement of one commodity by another, one variety of a commodity by another, or one outlet by another, has no impact on the overall index. The main exceptions to this result occur when replacing varieties of commodities that are purchased only occasionally, and a judgement is made that the quality ratio between the old and new variety is not the same as the ratio of their prices. In these cases there is an impact on the index, up or down, depending on whether the change in price reported is higher or lower than the change in quality. From the experience of the CPI in these six years there has been a correlation between the price ratio of a variety and its replacement and the index movement that derives from the judgement. The direction and size of the impact on the index depends largely on whether an item is replaced with a higher or lower priced item. For these reasons, the paper argues that more attention should be paid to ensuring that the item selection is more representative of current sales than has traditionally been the case.

    Release date: 1999-05-13
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