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| | Abstract | | The Clean Air Act has assumed the central role in US climate policy, directing the development of regulations governing greenhouse gas emissions from existing coal-fired power plants. This paper examines the operation of coal-fired generating units over 25 years to estimate the marginal costs and potential magnitude of emissions reductions from improving their efficiency. We find that a 10 percent increase in coal prices causes a 0.2 to 0.5 percent heat rate reduction, broadly consistent with engineering assessments. We also find that coal prices have a significant effect on utilization. The results are used to compare cost-effectiveness of alternative policies. |
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