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Valuing water quality improvement in China : a case study of lake Puzhehei in Yunnan province

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  • Wang, Hua
  • Shi, Yuyan
  • Kim, Yoonhee
  • Kamata, Takuya
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    Abstract

    While polluted surface water is encountered across most of China, few economic valuation studies have been conducted on water quality changes. Limited information about the economic values associated with those potential water quality improvements or deteriorations is a disadvantage for making proper choices in water pollution control and clean-up activities. This paper reports an economic valuation study conducted in Yunnan, China, which aims to estimate the total value of a real investment project to improve the water quality of Lake Puzhehei by one grade level. Located in Qiubei County, which is far from large cities, the lake has been experiencing fast water quality deterioration in the past years. A conservative estimation strategy shows that on average a household located in Qiubei County is willing to pay about 30 yuan per month continuously for 5 years for water quality improvement, equivalent roughly to 3 percent of household income. The elasticity of willingness-to-pay with respect to income is estimated to be 0.21. The economic rate of return of the proposed project is estimated to be 18 percent, indicating a strong demand and high efficiency of investment in water quality improvement in China. This study also demonstrates that previous knowledge about water quality changes and the project may have a significant positive impact on people's valuation, and that the interviewer effect on valuation can be negative.

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    Bibliographic Info

    Paper provided by The World Bank in its series Policy Research Working Paper Series with number 5766.

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    Date of creation: 01 Aug 2011
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    Handle: RePEc:wbk:wbrwps:5766

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    Keywords: Water and Industry; Environmental Economics&Policies; Water Supply and Sanitation Governance and Institutions; Town Water Supply and Sanitation; Water Supply and Systems;

    This paper has been announced in the following NEP Reports:

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    1. Mary F. Evans & Nicholas E. Flores & Kevin J. Boyle, 2003. "Multiple-Bounded Uncertainty Choice Data as Probabilistic Intentions," Land Economics, University of Wisconsin Press, vol. 79(4), pages 549-560.
    2. Welsh, Michael P. & Poe, Gregory L., 1998. "Elicitation Effects in Contingent Valuation: Comparisons to a Multiple Bounded Discrete Choice Approach," Journal of Environmental Economics and Management, Elsevier, vol. 36(2), pages 170-185, September.
    3. Wang, Hua & Whittington, Dale, 2005. "Measuring individuals' valuation distributions using a stochastic payment card approach," Ecological Economics, Elsevier, vol. 55(2), pages 143-154, November.
    4. Zhongmin, Xu & Guodong, Cheng & Zhiqiang, Zhang & Zhiyong, Su & Loomis, John, 2003. "Applying contingent valuation in China to measure the total economic value of restoring ecosystem services in Ejina region," Ecological Economics, Elsevier, vol. 44(2-3), pages 345-358, March.
    5. Zhongmin, Xu & Loomis, John & Zhiqiang, Zhang & Hamamura, Kuino, 2006. "Evaluating the performance of different willingness to pay question formats for valuing environmental restoration in rural China," Environment and Development Economics, Cambridge University Press, vol. 11(05), pages 585-601, October.
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    Cited by:
    1. Ahlheim, Michael & Börger, Tobias & Frör, Oliver, 2012. "The ecological price of getting rich in a green desert: A contingent valuation study in rural Southwest China," FZID Discussion Papers 55-2012, University of Hohenheim, Center for Research on Innovation and Services (FZID).

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