April 23, 1999 (The Editor’s Desk is updated each business day.)
Have our price indexes dampened
productivity measures?
About 57 percent of the current-dollar output used in
measuring business sector productivity is adjusted for the effects of price change using
portions of the Consumer Price Index (CPI). Thus, any possible bias in the CPI results in
incorrect real output and productivity growth rates.
[Chart data—TXT]
A 1996 report by the Advisory Commission to Study the CPI stated that the rate of
change in the CPI was biased upward by about 1.1 percentage points per year. That estimate
reflected, in part, potential biases due to quality change and new product introductions.
The Bureau of Labor Statistics has responded to these criticisms of the CPI and
disagrees with many of the findings of the Commission. However, assuming all the
Commission’s estimates, including those for quality change and new product bias,
actually were correct for the items used to deflate business sector output, real output
and productivity growth in the sector would have been understated by approximately 0.6
percentage points in 1997. Roughly half the understatement would have been attributable to
quality adjustment issues; most of the rest has been addressed by the recent adoption of
geometric means in the CPI formula.
Labor productivity (output per hour) in the business sector increased by about 1.7
percent in 1997; adding 0.6 percentage points would have raised the estimated growth rate
by about a third.
Productivity statistics are a product of the Quarterly
Labor Productivity program. The CPI is a product of the Consumer Price Index program. For more information on the impact of price
indexes on productivity see, "How
price indexes affect BLS productivity measures," Monthly Labor Review,
February 1999. For more information on measurement issues in the Consumer Price Index see,
"Updated Response To The
Recommendations Of The Advisory Commission To Study The Consumer Price Index (June
1998)," and "Measurement
Issues in the Consumer Price Index (June 1997)" and "Incorporating a
geometric new formula in the CPI," Monthly Labor Review, October 1998.
Of interest
Spotlight on Statistics: National Hispanic Heritage Month
In this Spotlight, we take a look at the Hispanic labor force—including labor force participation, employment and unemployment, educational attainment, geographic location, country of birth, earnings, consumer expenditures, time use, workplace injuries, and employment projections.
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