The economic impact of restricted water supply: A computable general equilibrium analysis

M. Berrittella, A.Y. Hoekstra, K. Rehdanz, R. Roson, R.S.J. Tol

Research output: Contribution to JournalArticleAcademicpeer-review

Abstract

Water problems are typically studied at the level of the river catchment. About 70% of all water is used for agriculture, and agricultural products are traded internationally. A full understanding of water use is impossible without understanding the international market for food and related products, such as textiles. The water embedded in commodities is called virtual water. Based on a general equilibrium model, we offer a method for investigating the role of water resources and water scarcity in the context of international trade. We run five alternative scenarios, analyzing the effects of water scarcity due to reduced availability of groundwater. This can be a consequence of physical constraints, and of policies curbing water demand. Four scenarios are based on a "market solution", where water owners can capitalize their water rent or taxes are recycled. In the fifth "non-market" scenario, this is not the case; supply restrictions imply productivity losses. Restrictions in water supply would shift trade patterns of agriculture and virtual water. These shifts are larger if the restriction is larger, and if the use of water in production is more rigid. Welfare losses are substantially larger in the non-market situation. Water-constrained agricultural producers lose, but unconstrained agricultural produces gain; industry gains as well. As a result, there are regional winners and losers from water supply constraints. Because of the current distortions of agricultural markets, water supply constraints could improve allocative efficiency; this welfare gain may more than offset the welfare losses due to the resource constraint. © 2007 Elsevier Ltd. All rights reserved.
Original languageEnglish
Pages (from-to)1799-1813
Number of pages15
JournalWater Research
Volume42
DOIs
Publication statusPublished - 2007

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computable general equilibrium analysis
Water supply
economic impact
water supply
Economics
Water
water
Agriculture
allocative efficiency
agricultural market
agriculture
market
international trade
Agricultural products
water demand
commodity
International trade
water use
Taxation
Water resources

Cite this

Berrittella, M. ; Hoekstra, A.Y. ; Rehdanz, K. ; Roson, R. ; Tol, R.S.J. / The economic impact of restricted water supply: A computable general equilibrium analysis. In: Water Research. 2007 ; Vol. 42. pp. 1799-1813.
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The economic impact of restricted water supply: A computable general equilibrium analysis. / Berrittella, M.; Hoekstra, A.Y.; Rehdanz, K.; Roson, R.; Tol, R.S.J.

In: Water Research, Vol. 42, 2007, p. 1799-1813.

Research output: Contribution to JournalArticleAcademicpeer-review

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