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The bias of integrated assessment models that ignore climate catastrophes

机译:综合评估模型对气候灾难的偏见

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摘要

Climate scientists currently predict there is a small but real possibility that climate change will lead to civilization threatening catastrophic events. Martin Weitzman has used this evidence along with his controversial “Dismal Theorem” to argue that integrated assessment models of climate change cannot be used to determine an optimal price for carbon dioxide. In this paper, I provide additional support for Weitzman’s conclusions by running numerical simulations to estimate risk premiums toward climate catastrophes. Compared to the assumptions found in most integrated assessment models, I incorporate into the model a more realistic range of uncertainty for both climate catastrophes and societal risk aversion. The resulting range of risk premiums indicates that the conclusions drawn from integrated assessment models that do not incorporate the potential for climate catastrophes are too imprecise to support any particular policy recommendation. The analysis of this paper is more straightforward and less technical than Weitzman’s, and therefore the conclusions should be accessible to a wider audience.
机译:气候科学家目前预测,气候变化将导致文明威胁灾难性事件的可能性很小,但却是真实的可能性。马丁·韦茨曼(Martin Weitzman)利用这一证据以及他颇有争议的“令人沮丧的定理”来论证说,气候变化综合评估模型不能用于确定二氧化碳的最佳价格。在本文中,我通过运行数值模拟来估算针对气候灾难的风险溢价,为韦茨曼的结论提供了额外的支持。与大多数综合评估模型中发现的假设相比,我将气候灾难和社会风险规避的不确定性更加现实地纳入模型中。由此产生的风险溢价范围表明,从综合评估模型得出的结论没有包含潜在的气候灾难,这些结论过​​于不精确,无法支持任何特定的政策建议。与Weitzman的论文相比,本文的分析更为直接,技术性也较低,因此结论应为更多的读者所接受。

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  • 来源
    《Climatic Change》 |2012年第4期|p.575-595|共21页
  • 作者

    Noah Kaufman;

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