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Water Pricing and investment in Melbourne: General Equilibrium Analysis with Uncertain Stream Flow

Author

Listed:
  • J. Mark Horridge
  • Peter B. Dixon
  • Maureen T. Rimmer

Abstract

We describe the theory, computation and results of a multiperiod general equilibrium model designed to assist an urban water authority in its pricing and investment decisions. The model includes gestation periods in the creation of dams, main sewers and treatment plants. It allows for lumpy capital items and recognizes cost differences in the provision of services in peak and non-peak times. Its general equilibrium framework is convenient for handling links between the water authority and the rest of the economy, especially the housing sector. We have used two computational approaches. In the first, we reformulate the model as a single-entity optimization problem and then apply a linear programming package. We have found that a better approach is to apply Newton-Raphson methods to a formulation of the model as a set of equations depicting purely competitive behaviour in all productive activities. A special feature of this paper is an integration of the model's results, obtained under the assumption of certainty, with data on weather-induced variations in streamflow and demand. Using Monte Carlo techniques we assess the risks of water shortages associated with the investment and pricing strategies that our model indicates.

Suggested Citation

  • J. Mark Horridge & Peter B. Dixon & Maureen T. Rimmer, 1993. "Water Pricing and investment in Melbourne: General Equilibrium Analysis with Uncertain Stream Flow," Centre of Policy Studies/IMPACT Centre Working Papers ip-63, Victoria University, Centre of Policy Studies/IMPACT Centre.
  • Handle: RePEc:cop:wpaper:ip-63
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    Citations

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    Cited by:

    1. Anne Briand, 2008. "Les tarifications au coût marginal versus coût moyen face à des chocs climatiques au Sénégal : un modèle dynamique d’équilibre général calculable appliqué à l’eau," Économie et Prévision, Programme National Persée, vol. 185(4), pages 103-122.

    More about this item

    Keywords

    water pricing and investment uncertain streamflow water policy in a general equilibrium model water policy for Melbourne linear programming Newton-Raphson Monte Carlo peak and non-peak;

    JEL classification:

    • C68 - Mathematical and Quantitative Methods - - Mathematical Methods; Programming Models; Mathematical and Simulation Modeling - - - Computable General Equilibrium Models
    • Q25 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Renewable Resources and Conservation - - - Water

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