Environmental Valuation & Cost-Benefit News
Valuing water quality improvements in the United States using meta-analysis: Is the glass half-full or half-empty for national policy analysis?
08/31/07
08:46:50 pm, by damageva 
, 240 words, 352 views 
Categories: Water, Academic Study/Journal Article, Contingent Valuation, Surveys,.., Environmental Economics / Ecological Economics, Costs and Benefits
Valuing water quality improvements in the United States using meta-analysis: Is the glass half-full or half-empty for national policy analysis?
Abstract: The literature estimating the economic value for water quality changes has grown considerably over the last 30 years, resulting in an expanded pool of information potentially available to support national and regional policy analysis. Using 131 willingness to pay estimates from 18 studies that use a similar definition of water quality, we performed a meta-regression analysis and found mixed results. We find that WTP varies in systematic and expected ways with respect to factors such as the size of the water quality changes, average household income, and use/nonuse characteristics of respondents. As a whole, we conclude that our meta-regression results provide a reasonable basis for estimating expected WTP values for defined changes in water quality. However, despite a large number of existing economic valuation studies, relatively few could be meaningfully combined through meta-analysis due to heterogeneity in the commodities being valued in the original studies. Based on these findings, we provide recommendations for future research, including suggestions regarding more standardized approaches for defining water quality and reporting information in valuation studies.
Keywords: Water quality valuation; Meta-analysis; Meta-regression analysis; Benefit transfer
JEL classification codes: Q2
by George Van Houtven 1, John Powers 2 and Subhrendu K. Pattanayak 1
1. RTI International, 3040 Cornwallis Road, P.O. Box 12194, Research Triangle Park, NC 27709-2194, United States; Telphone: +1 919 541 7150
2. U.S. Environmental Protection Agency, 1200 Pennsylvania Ave., NW, Washington, DC 20460, United States
Resource and Energy Economics via Elsevier Science Direct www.ScienceDirect.com
Volume 29, Issue 3; September, 2007; Pages 206-228
http://dx.doi.org/10.1016/j.reseneeco.2007.01.002
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