模型很简单，数据要求低，很容易做。
Hily et al., (2015).Assessing the cost-effectiveness of a biodiversity conservation policy: A bio-econometric analysis of Natura 2000 contracts in forest, Ecological Economics, 119, pp197-209

Highlights
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We assess the cost-effectiveness of Natura 2000 contracts in forest areas in France
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We jointly estimate a cost function for biodiversity conservation and a forest production set
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We find that biodiversity conservation and timber production are strongly substitutable
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Biodiversity conservation contracts are characterized by increasing returns to scale
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Private forest owners are the most cost-effective for biodiversity conservation