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Effects of Terms of Trade Gains and Tariff Changes on the Measurement of U.S. Productivity Growth

Robert Feenstra (), Benjamin Mandel (), Marshall B. Reinsdorf and Matthew J. Slaughter

No 15592, NBER Working Papers from National Bureau of Economic Research, Inc

Abstract: Since 1995, growth in productivity in the United States appears to have accelerated dramatically. In this paper, we argue that part of this apparent speed-up actually represents gains in the terms of trade and tariff reductions, especially for information-technology products. We demonstrate how unmeasured gains in the terms of trade and declines in tariffs can cause conventionally measured growth in real output and productivity to be overstated. Building on the GDP function approach of Diewert and Morrison, we develop methods for measuring these effects. From 1995 through 2006, the average growth rates of our alternative price indexes for U.S. imports are 1.5% per year lower than the growth rate of price indexes calculated using official methods. Thus properly measured terms-of-trade gain can account for close to 0.2 percentage points per year, or about 20%, of the 1995-2006 apparent increase in productivity growth for the U.S. economy. Bias in the price indexes used to deflate domestic output is a question beyond the scope of this paper, but if upward bias were also present in those indexes, this could offset some of the effects of mismeasurement of gains in terms of trade.

JEL-codes: F43 O47 (search for similar items in EconPapers)
Date: 2009-12
New Economics Papers: this item is included in nep-eff, nep-int and nep-opm
Note: ITI
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Published as Robert C. Feenstra & Benjamin R. Mandel & Marshall B. Reinsdorf & Matthew J. Slaughter, 2013. "Effects of Terms of Trade Gains and Tariff Changes on the Measurement of US Productivity Growth," American Economic Journal: Economic Policy, American Economic Association, vol. 5(1), pages 59-93, February.

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