| Approaches to benefit analysis |
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| v | Human
capital |
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| v | Willingness-to-pay |
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| Ø | Survey |
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| Ø | Occupational
behavior |
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| Ø | Consumer
behavior |
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| v | Credible
range from above: |
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| Ø | $2.1
million to $11 million (1995 dollars) |
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| Ø | $2.5
million to $13 million (2003 dollars) |
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