The precision and accuracy of U.S. environmental impact statements |
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Authors: | Paul J Culhane |
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Institution: | (1) Center for Urban Affairs and Policy Research, Northwestern University, 2040 Sheridan Road, 60201 Evanston, Illinois, USA |
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Abstract: | A post-project audit was conducted of 239 impacts forecast in an representative cross-section of 29 U.S. environmental impact statements. Results must be qualified because of the imprecision of EIS forecasts and the quality of data available to a retrospective evaluator. Relatively few forecasts were found to be inaccurate and even fewer unanticipated impacts were identified. However, only 30% of the impacts were unqualifiedly close to their forecasts, with almost as many rated accurate principally by virtue of the vagueness of the forecasts. |
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