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Stock Return Predictability in a Production Economy


Ilan Cooper


BI Norwegian Business School; Tel Aviv University, Graduate School of Business Administration

Richard Priestley


Norwegian Business School

3/12/05

AFA 2006 Boston Meetings Paper

Abstract:     
This paper demonstrates that the standard real business cycle model, augmented by capital adjustment costs and variable capital utilization, yields countercyclical consumption growth volatility and equity risk premia predictability. In the model, as in the data, the investment to capital ratio and the fraction of investment in output are procyclical due to consumption smoothing. These two results imply that as productivity declines due to adverse productivity shocks, output falls at increasing rates (since in high productivity states the growth of the economy's stock of capital offsets the effect on output of productivity declines) and investment must be reduced by increasing rates if consumption were to fall at a constant rate. Convex capital adjustment costs and time to build (note that even in the standard RBC model capital takes one period to build) imply a desire for investment smoothing and a trade-off between investment smoothing and consumption smoothing. Since high productivity states are more likely in the data (as well as in the model) than low productivity states, much of the economy's consumption smoothing (i.e. investment fluctuations) occurs when productivity fluctuates between two relatively high states. The desire for investment smoothing implies that in the less frequent cases of transition into lower productivity states, more of the decline in output is absorbed by consumption. Consequently, in the model consumption growth is countercyclical (which is consistent with the empirical findings in Kandel and Stambaugh (1990) and Bekaert and Liu (2004)) as is the equity risk premium. Our model incorporates variable capital utilization rates which give rise to a countercyclical output gap. Model simulations show that the output gap serves as a measure for recessions and is positively correlated with future excess stock returns. In the data we find that the output gap is a strong predictor of future excess returns over both short and long horizons, and does a better job, both in-sample and out-of-sample, than other variables known to predict excess returns.

Number of Pages in PDF File: 42

Keywords: Predictability, countercyclical consumption volatility, output gap

JEL Classification: G12, E22, E23

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Date posted: March 25, 2005  

Suggested Citation

Cooper, Ilan and Priestley, Richard, Stock Return Predictability in a Production Economy (3/12/05). AFA 2006 Boston Meetings Paper. Available at SSRN: http://ssrn.com/abstract=685142 or http://dx.doi.org/10.2139/ssrn.685142

Contact Information

Ilan Cooper (Contact Author)
BI Norwegian Business School ( email )
Nydalsveien 37
Oslo, 0442
Norway
Tel Aviv University, Graduate School of Business Administration ( email )
P.O. Box 39010
Ramat Aviv, Tel Aviv, 69978
Israel
Richard Priestley
Norwegian Business School ( email )
Nydalsveien
37
N-0442 Oslo, 0283
Norway
47 46410515 (Phone)
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