The Consumption-Wealth Ratio Under Asymmetric Adjustment

This paper argues that nonlinear adjustment may provide a better explanation of °uctuations in the consumption-wealth ratio. The nonlinearity is captured by a Markov-switching vector error-correction model that allows the dynamics of the relationship to di®er across regimes. Estimation of the system suggests that these states are related to the behaviour of ¯nancial markets. In fact, estimation of the system suggests that short-term deviations in the consumption-wealth ratio will forecast either asset returns or consumption growth: the ¯rst when changes in wealth are transitory; the second when changes in wealth are permanent. Our approach uncovers a richer and more complex dynamics in the consumption-wealth ratio than previous results in the literature, whilst being in accordance with theoretical predictions of a simple model of consumption under uncertainty.