living standards, and the progress that has been made in addressing the substitu-
tion issue, the most important challenge facing the Bureau of Labor Statistics at the
present time is how to deal with quality changes. The problem with the traditional
the BLS fails to make adjustments for such changes. In fact it does, and quite
frequently. Rather, the problem is that the traditional techniques for adjustment
may often mismeasure the effect of the quality changes on the price index.
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