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Résumé :
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Economic evaluation of parks and wilderness areas, known as amenity resources, has been long neglected by traditional cost-benefit analysis. the result has been that land management personnel, faced with allocation decisions involving incompatible uses, have often opted for the tangible benefits of extractive development, taking little account of the economic losses incurred in the destruction of an irreplaceable natural area. in this study, authors put the amenity resources of natural environments into an analytical framework comparable to that for the extractive resources. the model and theoretical background of their techniques are illustrated by case studies. they point out that resource development activities undertaken on public lands often receive financial advantages - preferential fax treatment, subsidized capital, and access to public resources - that are not taken into account in the costs of the project.
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