An asymmetric error correction model of UK consumer spending

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Abstract:

This paper augments the Granger and Lee (Journal of Applied Econometrics 4, 1989) non-symmetric error (equilibrium) correction model to assess the possibility that, in the aggregate, consumers respond differently to different types of disequilibrium error. This idea is illustrated using an Engle-Granger implementation of the Davidson, Hendry, Srba and Yeo (DHSY, Economic Journal, 80, 1978) model. The disequilibrium error is endogenously determined by the long-run, empirical model and a binary dummy variable captures two alternative states, above and below equilibrium spending. Interaction of the dummy variable with key variables in a short-run dynamic model of UK consumer spending augments the dynamics of the DHSY model. Income elasticities, inflation elasticities and speeds of adjustment are all seen to change significantly depending on whether the disequilibrium error is positive or negative, and is suggestive of asymmetric behaviour on the part of consumers. Moreover, the asymmetrically augmented model substantially outperforms a symmetric model with standard error improvements in excess of 50%.

Document Type: Research Article

DOI: http://dx.doi.org/10.1080/0003684022000035782

Affiliations: Department of Economics, Keynes College, University of Kent, Canterbury, Kent CT2 7NP, Institute for Employment Research, University of Warwick, Coventry, CV4 YAL

Publication date: January 1, 2003

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