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With the release for the June 2009 Construction Union Wage Price Index (CUWRI) (tables 3 and 4), the Producer Prices Division updated the construction union wage rate indexes by changing the base year from 1992 to 2007, updating the weights and by adding two metropolitan areas to the sample.
The 2007=100 CUWRI series is available retroactively from January 1971 in CANSIM table 327-0045 but has different databank numbers. The 1992=100 based NHPI continues to appear in table 327-0004, however, the 1992=100 based index has not been updated after May 2009. Since the index has been mathematically rebased between January 1971 and June 2009, the index movement for the period from January 1971 to December 2006 is the same for the 1992=100 and 2007=100 series. However, for the period from January 2007 to June 2009, the movement will be different since the weights have been revised. To assist users, a concordance table found in Appendix IV will help users link the new series to the old.
From January 2007, the weights used are based on the product of the number of workers employed in each trade and in each metropolitan area, as derived from 2006 Census data, and the 2007 average of the hourly rates of each trade in each metropolitan area. A fixed- basket Laspeyres index formula is used in the calculation of the indexes.
