House Prices, Expectations, and Time-Varying Fundamentals

house prices

House Prices, Expectations, and Time-Varying Fundamentals

Abstract

We investigate the behavior of the equilibrium price-rent ratio for housing in a standard asset pricing model. We allow for time-varying risk aversion (via external habit formation) and time-varying persistence and volatility in the stochastic process for rent growth,consistent with U.S. data for the period 1960 to 2011. Under fully-rational expectations,the model significantly under-predicts the volatility of the U.S. price-rent ratio for reason-able levels of risk aversion. We demonstrate that the model can approximately match the volatility of the price-rent ratio in the data if near-rational agents continually update their estimates for the mean, persistence and volatility of fundamental rent growth using only recent data (i.e., the past 4 years), or if agents employ a simple moving-average forecast rule that places a large weight on the most recent observation. These two versions of the model can be distinguished by their predictions for the correlation between expected future returns on housing and the price-rent ratio. Only the moving-average model predicts a positive correlation such that agents tend to expect higher future returns when house prices are high relative to fundamentals–a feature that is consistent with survey evidence on the expectations of real-world housing investors.

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House Prices, Expectations, and Time-Varying Fundamentals

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