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By Force of Habit: A Consumption-Based Explanation of Aggregate Stock Market Behavior

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  • John Y. Campbell
  • John H. Cochrane

Abstract

We present a consumption-based model that explains the procyclical variation of stock prices, the long-horizon predictability of excess stock returns, and the countercyclical variation of stock market volatility. Our model has an i.i.d. consumption growth driving process, and adds a slow-moving external habit to the standard power utility function. The latter feature produces cyclical variation in risk aversion, and hence in the prices of risky assets. Our model also predicts many of the difficulties that beset the standard power utility model, including Euler equation rejections, no correlation between mean consumption growth and interest rates, very high estimates of risk aversion, and pricing errors that are larger than those of the static CAPM. Our model captures much of the history of stock prices, given only consumption data. Since our model captures the equity premium, it implies that fluctuations have important welfare costs. Unlike many habit-persistence models, our model does not necessarily produce cyclical variation in the risk free interest rate, nor does it produce an extremely skewed distribution or negative realizations of the marginal rate of substitution.

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Bibliographic Info

Paper provided by National Bureau of Economic Research, Inc in its series NBER Working Papers with number 4995.

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Date of creation: Jan 1995
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Handle: RePEc:nbr:nberwo:4995

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  1. By Force of Habit: A Consumption-Based Explanation of Aggregate Stock Market Behavior
    by Miguel in Simoleon Sense on 2010-09-04 01:36:09
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  1. John Y. Campbell in Wikipedia (German)

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