Missing markets for storage and the potential economic cost of expanding the spatial scope of water trade

Donna Brennan

Australian Journal of Agricultural and Resource Economics, 2008, vol. 52, issue 4, 471-485

Abstract: A great deal of attention has been given in recent years to the question of externalities associated with water entitlements and how third parties can be protected without restricting opportunities for water trade. Yet one market failure that has received no attention at all is the missing market for storage that arises from the specification of water entitlements, particularly in Victoria where historically all storage decisions were made at the centralised level and where any additional carryover was treated as common property. The economic significance of the missing market for storage is demonstrated using an empirical model that represents the spatial-temporal pattern of irrigation water demand in the Goulburn Valley and decisions regarding inter-year storage of water in Lake Eildon. It is shown that, because irrigators have no incentive to trade-off the benefit of current use (or sale) with the value of water storage, there is an erosion of reliability when opportunities for trade are broadened. The empirical results demonstrate that the loss in economic value associated with reduced reliability are as large as the gains from trade, so there is no net benefit from trade. Copyright 2008 The Author. Journal compilation 2008 Australian Agricultural and Resource Economics Society Inc. and Blackwell Publishing Asia Pty Ltd.

Date: 2008
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