Investment and Value: A Neoclassical Benchmark
48 Pages Posted: 11 Jun 2008
Date Written: March 2008
Which investment model best fits firm-level data? To answer this question we estimate alternative models using Compustat data. Surprisingly, the two best-performing specifications are based on Hayashi's (1982) model. This model's foremost implication, that Q is a sufficient statistic for determining a firm's investment decision, has been often rejected because cash-flow and lagged-investment effects are present in investment regressions. However, we find that these regression results are quite fragile and ineffectual for evaluating model performance. So, forget what investment regressions tell you. Models based on Hayashi (1982) provide a very good description of investment behaviour at the firm level.
Keywords: Cash flow, Tobin's q
JEL Classification: E22
Suggested Citation: Suggested Citation