The United States recently ratified the Paris Agreement, under the UN Framework Convention on Climate Change (UNFCCC), in which it pledged to reduce greenhouse gas emissions by 26–28 percent, relative to 2005, by 2025. In the absence of policy efforts beyond those currently in place or already proposed by the Obama administration, the United States would likely fall well short of its promises. However, a federal economy-wide carbon tax on US carbon dioxide emissions could significantly contribute to the additional reductions necessary to fulfill our international climate commitments. Using a detailed multisector computable general equilibrium (CGE) model, we predict the carbon price paths that would be necessary to meet the 28 percent emissions target and show the economic costs of such carbon-pricing policies. We then demonstrate how both the price paths and associated costs change if action is delayed.

中文翻译：

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使用碳税来满足美国的国际气候承诺

美国最近根据《联合国气候变化框架公约》（UNFCCC）批准了《巴黎协定》，其中承诺到2025年将温室气体排放量与2005年相比减少26％至28％。奥巴马政府目前已经提出或已经提出的建议，美国很可能无法兑现其承诺。但是，针对美国二氧化碳排放量的联邦经济范围内的碳税可能会大大有助于实现我们的国际气候承诺所必需的额外减排。使用详细的多部门可计算一般均衡（CGE）模型，我们预测了实现28％排放目标所必需的碳价格路径，并显示了此类碳定价政策的经济成本。