气候政策中的效率与主权权衡量
Nico Bauer1, Christoph Bertram2, Anselm Schultes2
1Potsdam Institute for Climate Impact Research (PIK), Member of the Leibniz Association, Potsdam, Germany. nico.bauer@pik-potsdam.de.
Nature
|December 10, 2020
概括
全球气候目标需要公平的成本分担. 这项研究表明混合碳定价和金融转移平衡了经济效率和国家主权,
科学领域:
- 气候科学
- 环境经济学
- 国际政策
背景情况:
- 巴黎协定旨在限制全球变暖,强调公平和差异化的责任.
- 统一碳价格的上限和贸易政策具有成本效益,但可能会给发展中国家带来负担,并引发主权问题.
- 为了实现公平的努力分配,通常需要大量的国际资金转移.
研究的目的:
- 研究替代气候政策战略,平衡成本效益,公平性和国家主权.
- 分析统一碳定价,差异化碳定价和国际金融转移之间的权衡.
- 量化不同政策组合的财务和效率影响.
主要方法:
- 用REMIND-MAgPIE综合评估模型进行政策分析.
- 对比了三个政策情景:统一碳价格的财政转移,没有转移的差异化碳价格和混合方法.
- 国际金融转移和经济效率损失的量化现值.
主要成果:
- 在统一的碳定价下平衡努力需要4.4万亿美元的转移;没有转移,它需要极端的价格差异 (>100倍) 并造成2.6万亿美元的效率损失.
- 混合政策表明非线性权衡:温和的碳价格偏差显著减少了转移需求,效率损失很小.
- 通过缩小碳价格差异,适度的资金转移大大提高了效率.
结论:
- 混合气候政策结合温和的碳价格差异化和金融转移,为实现全球气候目标提供了可行的途径.
- 这些战略可以减轻发展中国家的经济负担, 维护国家主权.
- 了解这些权衡对于设计有效的气候和特定部门政策组合至关重要.
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