"This bulletin contains a summary of technical changes made in the Consumer Price Index data collection and calculation procedures during the period from 1959 through 1963. Among these changes are the rebasing from 1947-49=100 to 1957-59=100; improvements in price collection through expansion of the outlet samples; and improvements in the measurement of the effects of quality changes. The bulletin also includes tables of indexes for the U.S. city average and for individual cities. The bulletin was prepared by the Office of Prices and Living Conditions."--Page iii.

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