Energy use is inelastic in time-series data, but elastic in international cross-section data. Two models of energy use reproduce these elasticities: a putty-putty model with adjustment costs developed by Pindyck and Rotemberg (1983) and a putty-clay model. In the Pindyck-Rotemberg model, capital and energy are highly complementary in both the short run and the long run. In the putty-clay model, capital and energy are complementary in the short run, but substitutable in the long run. We highlight the differences in the cross-section implications of the models by considering the effect of an energy tax on output in both models. In the putty-putty model, an energy tax that doubles the price of energy leads to a fall in output in the long run of 33%. In contrast, the same tax in the putty-clay model leads to a fall in output of only 5.3%.
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Paper provided by Federal Reserve Bank of Minneapolis in its series Staff Report with number
230.
Length: Date of creation: 1997 Date of revision: Publication status: Published in American Economic Review (Vol. 89, No. 4, September 1999, pp. 1028-43) Handle: RePEc:fip:fedmsr:230
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Ricardo J. Caballero, 1997.
"Aggregate Investment,"
NBER Working Papers
6264, National Bureau of Economic Research, Inc.
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