Is the U.S. Aggregate Production Function Cobb-Douglas? New Estimates of the Elasticity of Substitution
I present new estimates of the elasticity of substitution between capital and labor using data from the private sector of the U.S. economy for the period 1948-1998. I first adopt Berndt's (1976) specification, which assumes that technological change is Hicks neutral. Consistently with his results, I estimate elasticities of substitution that are not significantly different from one. I next show, however, that restricting the analysis to Hicks-neutral technological change necessarily biases the estimates of the elasticity towards one. When I modify the econometric specification to allow for biased technical change, I obtain significantly lower estimates of the elasticity of substitution. I conclude that the U.S. economy is not well described by a Cobb-Douglas aggregate production function. I present estimates based on both classical regression analysis and time series analysis. In the process, I deal with issues related to the nonsphericality of the disturbances, the endogeneity of the regressors, and the nonstationarity of the series involved in the estimation.
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Volume (Year): 4 (2004)
Issue (Month): 1 (April)
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References listed on IDEAS
Please report citation or reference errors to , or , if you are the registered author of the cited work, log in to your RePEc Author Service profile, click on "citations" and make appropriate adjustments.:
- Robert J. Barro, 1995.
"Inflation and Economic Growth,"
NBER Working Papers
5326, National Bureau of Economic Research, Inc.
- Phillips, P.C.B., 1986.
"Understanding spurious regressions in econometrics,"
Journal of Econometrics,
Elsevier, vol. 33(3), pages 311-340, December.
- Peter C.B. Phillips, 1985. "Understanding Spurious Regressions in Econometrics," Cowles Foundation Discussion Papers 757, Cowles Foundation for Research in Economics, Yale University.
- Bentollia, S. & Saint-Paul, G., 1999.
"Explaining Movements in the Labor Share,"
9905, Centro de Estudios Monetarios Y Financieros-.
- Bentolila, Samuel & Saint-Paul, Gilles, 1998. "Explaining Movements in the Labour Share," CEPR Discussion Papers 1958, C.E.P.R. Discussion Papers.
- Samuel Bentolila & Gilles Saint Paul, 1999. "Explaining movements in the labor share," Economics Working Papers 374, Department of Economics and Business, Universitat Pompeu Fabra.
- Daron Acemoglu, 2001.
"Directed Technical Change,"
NBER Working Papers
8287, National Bureau of Economic Research, Inc.
- Douglas Gollin, 2001.
"Getting Income Shares Right,"
Department of Economics Working Papers
2001-11, Department of Economics, Williams College.
- Granger, C. W. J. & Newbold, P., 1974. "Spurious regressions in econometrics," Journal of Econometrics, Elsevier, vol. 2(2), pages 111-120, July.
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