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Climate Change Policy: What Do the Models Tell Us?

机译:气候变化政策:这些模型告诉我们什么?

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Very little. A plethora of integrated assessment models (IAMs) have been constructed and used to estimate the social cost of carbon (SCC) and evaluate alternative abatement policies. These models have crucial flaws that make them close to useless as tools for policy analysis: certain inputs (e.g., the discount rate) are arbitrary, but have huge effects on the SCC estimates the models produce; the models' descriptions of the impact of climate change are completely ad hoc, with no theoretical or empirical foundation; and the models can tell us nothing about the most important driver of the SCC, the possibility of a catastrophic climate outcome. IAM-based analyses of climate policy create a perception of knowledge and precision, but that perception is illusory and misleading.
机译:很少已经构建了许多综合评估模型(IAM),用于评估碳的社会成本(SCC)和评估替代减排政策。这些模型具有严重的缺陷,使其几乎无法用作政策分析工具:某些输入(例如折现率)是任意的,但会对模型产生的SCC估计产生巨大影响;模型对气候变化影响的描述完全是临时性的,没有理论或经验基础;这些模型无法告诉我们SCC的最重要驱动因素,即灾难性气候后果的可能性。基于IAM的气候政策分析可以创建对知识和精确度的感知,但是这种感知是虚幻的且具有误导性。

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