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Virtual water flows and trade liberalization.

J Ramirez-Vallejo1, P Rogers

  • 1Division of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA.

Water Science and Technology : a Journal of the International Association on Water Pollution Research
|June 16, 2004
PubMed
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Analyzing agricultural trade's impact on water resources, this study simulates full trade liberalization. It reveals virtual water flows are independent of water endowments, challenging traditional economic theory.

Area of Science:

  • Environmental Science
  • Agricultural Economics
  • Water Resource Management

Background:

  • Understanding the intricate relationship between global agricultural trade and water resource utilization is crucial.
  • Assessing the potential impacts of agricultural trade liberalization on water resources is a growing concern.

Purpose of the Study:

  • To analyze the global trade of virtual water embedded in agricultural products.
  • To investigate the future effects of trade liberalization on virtual water trade dynamics.
  • To identify drivers behind shifts in virtual water trade patterns over time.

Main Methods:

  • Simulation of global agricultural trade under a full liberalization scenario.
  • Assessment of net virtual water flows resulting from the relocation of meat and cereal trade.

Related Experiment Videos

  • Estimation of country-level input demand functions for virtual water imports.

    • Main Results:

    • Virtual water trade flows were found to be independent of a nation's water resource endowments, contradicting the Heckscher-Ohlin Theorem.
    • Income and agricultural support elasticities for virtual water imports were estimated to be statistically significant.
    • Key factors influencing virtual water import variations include average income, population, agricultural value-added, irrigated area, and exports.

    Conclusions:

    • Trade liberalization significantly alters virtual water trade, with flows not solely determined by water availability.
    • Economic factors and trade policies play a more dominant role in virtual water flows than initially presumed.
    • The study provides empirical evidence for input demand functions, offering insights into national virtual water import behaviors.