Investment, Tobin's Q, and Multiple Capital Inputs
Despite their solid theoretical basis, models of business investment based on Tobin's Q theory have recorded a generally disappointing empirical performance. This paper examines one possible source of misspecification. When the firm's technology is expanded to include two or more capital inputs, the investment equation following from maximizing behavior includes Q as well as a series of additional explanatory variables. The importance of these omitted variables is assessed, and the econometric evidence is mixed, as the Multi-Capital Q model clearly dominates the Conventional specification but empirical problems remain. In addition, the implications of the parameter estimates from the Conventional and Multi-Capital models for tax policy are noted.
|Date of creation:||Oct 1986|
|Date of revision:|
|Publication status:||Published as "Multiple Capital Inputs, Q, and Investment Spending", JEDC, Vol. 17, no. 5/6 (1993): 907-928.|
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- Tobin, James, 1969. "A General Equilibrium Approach to Monetary Theory," Journal of Money, Credit and Banking, Blackwell Publishing, vol. 1(1), pages 15-29, February.
- Hausman, Jerry A, 1978.
"Specification Tests in Econometrics,"
Econometric Society, vol. 46(6), pages 1251-71, November.
- Lars Peter Hansen & Thomas J. Sargent, 1979.
"Formulating and estimating dynamic linear rational expectations models,"
127, Federal Reserve Bank of Minneapolis.
- Hansen, Lars Peter & Sargent, Thomas J., 1980. "Formulating and estimating dynamic linear rational expectations models," Journal of Economic Dynamics and Control, Elsevier, vol. 2(1), pages 7-46, May.
- Wu, De-Min, 1973. "Alternative Tests of Independence Between Stochastic Regressors and Disturbances," Econometrica, Econometric Society, vol. 41(4), pages 733-50, July.
- Seater, John J., 1982. "Marginal federal personal and corporate income tax rates in the U.S., 1909-1975," Journal of Monetary Economics, Elsevier, vol. 10(3), pages 361-381.
- Poterba, James M. & Summers, Lawrence H., 1983.
"Dividend taxes, corporate investment, and `Q',"
Journal of Public Economics,
Elsevier, vol. 22(2), pages 135-167, November.
- Nerlove, Marc, 1972. "Lags in Economic Behavior," Econometrica, Econometric Society, vol. 40(2), pages 221-51, March.
- Mussa, Michael L, 1977. "External and Internal Adjustment Costs and the Theory of Aggregate and Firm Investment," Economica, London School of Economics and Political Science, vol. 44(174), pages 163-78, May.
- 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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