Q Theory Without Adjustment Costs & Cash Flow Effects Without Financing Constraints
Tobin's Q exceeds one, even without any adjustment costs, for a firm that earns rents as a result of monopoly power or of decreasing returns to scale in production. Even when there are no adjustment costs and marginal Q is always equal to one, Tobin's Q is informative about the firm's growth prospects. We show that investment is positively related to Tobin's Q (which is observable average Q). This effect can be quantitatively small, which has been taken as evidence of very high adjustment costs in the empirical literature, but here is consistent with no adjustment costs at all. In addition, cash flow has a positive effect on investment, and this effect is larger for smaller, faster growing and more volatile firms, even though capital markets are perfect. These results provide a new theoretical foundation for Q theory and also cast doubt on evidence of financing constraints based on cash flow effects on investment
|Date of creation:||2004|
|Date of revision:|
|Contact details of provider:|| Postal: Society for Economic Dynamics Marina Azzimonti Department of Economics Stonybrook University 10 Nicolls Road Stonybrook NY 11790 USA|
Web page: http://www.EconomicDynamics.org/
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- Steven N. Kaplan & Luigi Zingales, 2000. "Investment-Cash Flow Sensitivities Are Not Valid Measures of Financing Constraints," The Quarterly Journal of Economics, Oxford University Press, vol. 115(2), pages 707-712.
- William C. Brainard & James Tobin, 1968. "Pitfalls in Financial Model-Building," Cowles Foundation Discussion Papers 244, Cowles Foundation for Research in Economics, Yale University.
- Russell Cooper & Joao Ejarque, 2000.
"Exhuming Q: Market Power vs. Capital Market Imperfections,"
Econometric Society World Congress 2000 Contributed Papers
0528, Econometric Society.
- Russell Cooper & Joao Ejarque, 2001. "Exhuming Q: Market Power vs. Capital Market Imperfections," NBER Working Papers 8182, National Bureau of Economic Research, Inc.
- Steven N. Kaplan & Luigi Zingales, 1997. "Do Investment-Cash Flow Sensitivities Provide Useful Measures of Financing Constraints?," The Quarterly Journal of Economics, Oxford University Press, vol. 112(1), pages 169-215.
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