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The UK consumption function and structural instability: improving forecasting performance using a time-varying parameter approach

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  • Haiyan Song
  • Peter Romilly
  • Xiaming Liu

Abstract

Previous studies indicate that the poor forecasting performance of constant parameter UK consumption expenditure models is caused by structural instability in the underlying data generating process. Typically, this instability is removed by reparameterization within the constant parameter framework. An alternative modelling strategy is to allow some, or all, of the parameters to vary over time. A UK non-durable consumption expenditure model with time-varying parameters is developed, based on the permanent income hypothesis of Friedman (1957). This model takes into account temporal changes in the average and marginal propensities to consume. The variation in the parameter estimates is given an economic interpretation in terms of the influence of omitted variables, namely UK financial liberalization and expectational changes. The forecasting performance of this model is superior to that of two widely used constant parameter models. Further tests show that, even if these constant parameter models are respecified as time varying parameter models, the authors' model still retains a superior forecasting performance.

Suggested Citation

  • Haiyan Song & Peter Romilly & Xiaming Liu, 1998. "The UK consumption function and structural instability: improving forecasting performance using a time-varying parameter approach," Applied Economics, Taylor & Francis Journals, vol. 30(7), pages 975-983.
    • Handle: RePEc:taf:applec:v:30:y:1998:i:7:p:975-983
    DOI: 10.1080/000368498325408
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    References listed on IDEAS

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    Cited by:

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    3. Feng-Li Lin & Wen-Yi Chen, 2020. "Did the Consumption Voucher Scheme Stimulate the Economy? Evidence from Smooth Time-Varying Cointegration Analysis," Sustainability, MDPI, vol. 12(12), pages 1-16, June.
    4. Song, Haiyan & Witt, Stephen F. & Jensen, Thomas C., 2003. "Tourism forecasting: accuracy of alternative econometric models," International Journal of Forecasting, Elsevier, vol. 19(1), pages 123-141.
    5. Ogechi Adeola & Nathaniel Boso & Olaniyi Evans, 2018. "Drivers of international tourism demand in Africa," Business Economics, Palgrave Macmillan;National Association for Business Economics, vol. 53(1), pages 25-36, January.
    6. Arns, Jürgen & Bhattacharya, Kaushik, 2005. "Modelling Aggregate Consumption Growth with Time-Varying Parameters," Bonn Econ Discussion Papers 15/2005, University of Bonn, Bonn Graduate School of Economics (BGSE).
    7. M. Matilla-Garcia & P. Perez & B. Sanz, 2006. "Testing for parameter stability: the Spanish consumption function," Applied Economics Letters, Taylor & Francis Journals, vol. 13(7), pages 445-448.

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