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Catching Up with the Joneses: Heterogeneous Preferences and the Dynamics of Asset Prices

Journal of Political Economy 2002 110(6), 1255-1285
We analyze a general equilibrium exchange economy with a continuum of agents who have “catching up with the Joneses” preferences and differ only with respect to the curvature of their utility functions. While individual risk aversion does not change over time, dynamic redistribution of wealth among the agents leads to countercyclical time variation in the Sharpe ratio of stock returns. We show that both the conditional risk premium and the return volatility are negatively related to the level of stock prices. Therefore, our model exhibits many of the empirically observed properties of aggregate stock returns, for example, patterns of autocorrelation in returns, the “leverage effect” in return volatility, and long‐horizon return predictability.

A multivariate model of strategic asset allocation

Journal of Financial Economics 2003 67(1), 41-80 open access
We develop an approximate solution method for the optimal consumption and portfolio choice problem of an infinitely long-lived investor with Epstein–Zin utility who faces a set of asset returns described by a vector autoregression in returns and state variables. Empirical estimates in long-run annual and post-war quarterly U.S. data suggest that the predictability of stock returns greatly increases the optimal demand for stocks. The role of nominal bonds in long-term portfolios depends on the importance of real interest rate risk relative to other sources of risk. Long-term inflation-indexed bonds greatly increase the utility of conservative investors.