Consumption Commitments and Asset Prices

Adam Szeidl and Raj Chetty ()

No 354, 2004 Meeting Papers from Society for Economic Dynamics

Abstract: This paper studies portfolio choice and asset prices in a model with two consumption goods, one of which involves a commitment in that its consumption can only be adjusted at a cost. Commitments effectively make investors more risk averse: they invest less in risky assets and smooth total consumption more. Aggregating over a population of such consumers implies dynamics that match those of a representative consumer economy with habit formation. Calibrations show that the model can resolve the equity premium puzzle. We test the key prediction that an exogenous increase in economic commitments (e.g., housing) causes a more conservative portfolio allocation using a novel instrumental variables strategy related to age at marriage. We find that a $1 increase in housing causes a 50-70 cent reallocation from stocks to bonds for the average investor. Exploiting differences in the variance of home prices across cities, we show that this effect is due to commitments and not greater exposure to housing price risk.

Keywords: habit formation; portfolio choice; housing (search for similar items in EconPapers)
JEL-codes: G11 G12 (search for similar items in EconPapers)
New Economics Papers: this item is included in nep-dge and nep-fin
Date: 2004
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