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Irrigation water productivity in Cambodian rice systems

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  • Wokker, Chris
  • Santos, Paulo
  • Ros, Bansok

Abstract

In the context of increasing competition for water, knowledge of the marginal productivity of water is crucial in determining its optimal allocation between users. Using primary, plot level panel data, this paper estimates the marginal productivity of water from supple- mentary irrigation in lowland rice systems in Cambodia, taking into account farmer and plot heterogeneity as well as self-selection of sup- plementary irrigation. Our estimates indicate a range of elasticity for rice output with respect to water inputs between 0.057 and 0.069 for wet season production, and an estimate of 0.125 in the dry season, sub- stantially lower than previous estimates based on either aggregate or trial data. We discuss the policy implications of these results, in par- ticular with respect to the utility of demand management policies and the challenges they pose to the decentralization of water management to Water Users Groups that are meant to be financially independent.

Suggested Citation

  • Wokker, Chris & Santos, Paulo & Ros, Bansok, 2012. "Irrigation water productivity in Cambodian rice systems," 2012 Conference, August 18-24, 2012, Foz do Iguacu, Brazil 126321, International Association of Agricultural Economists.
    • Handle: RePEc:ags:iaae12:126321
    DOI: 10.22004/ag.econ.126321
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    References listed on IDEAS

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    1. World Bank, 2006. "Reengaging in Agricultural Water Management: Challenges and Options," World Bank Publications - Books, The World Bank Group, number 6957.
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    Keywords

    Food Security and Poverty; International Development; Land Economics/Use; Productivity Analysis;
    All these keywords.

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