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Subsistence, Substitutability and Sustainability in Consumption

机译:消费中的生存,可替代性和可持续性

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摘要

We propose a representation of individual preferences with a subsistence requirement in consumption, and examine its implications for substitutability and sustainability. Specifically, we generalize the standard constant-elasticity-of-substitution (CES) utility specification for manufactured goods and environmental services, by adding a subsistence requirement for environmental services. We find that the Hicksian elasticity of substitution strictly monotonically increases with the consumption of environmental services above the subsistence requirement, and approaches the standard CES value as consumption becomes very large. Whether the two goods are market substitutes depends on the level of income. We further show that the subsistence requirement may jeopardize the existence of an intertemporally optimal and sustainable consumption path. Our results have important implications for growth, development and environmental policy.
机译:我们建议在消费中有生存需求的个人偏好的代表,并研究其对替代性和可持续性的影响。具体来说,我们通过增加对环境服务的生存要求,来概括用于制成品和环境服务的标准替代物恒定弹性(CES)实用程序规范。我们发现,随着环境服务的消费超过生存需求,希克斯代换弹性严格单调增加,并且随着消费变得非常大,其接近标准CES值。两种商品是否是市场替代品取决于收入水平。我们进一步表明,生存需求可能会危害跨时最佳和可持续的消费路径。我们的结果对增长,发展和环境政策具有重要意义。

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