Abstract: New Corporate Average Fuel Economy (CAFE) standards were recently passed in the United States with the twin goals of reducing greenhouse gas emissions and oil use. The new standards represent a dramatic change from recent policy. This paper examines the key features of the new rules, and compares them to previous CAFE standards in terms of flexibility and structure. The importance of consumer preferences and market forces on CAFE outcomes are identified. In the second part of the paper, the perspective of the consumer is explored. Consumer assessments of fuel economy savings with more fuel-efficient vehicles may be biased or incomplete, leading many to argue that there is an “energy efficiency gap” in consumer demand for vehicles. Reasons for such a gap, such as market failures, behavioral responses, and market barriers, are summarized. The implications for policy are discussed, including the role of combining CAFE with other policies.

Abstract: In 2009, President Obama pledged that, by 2020, the United States would achieve reductions in greenhouse gas emissions of 17 percent from 2005 levels. With the failure of Congress to adopt comprehensive climate legislation in 2010, the feasibility of the pledge was put in doubt. However, we find the United States is near to reaching this goal; currently, the country is on course to achieve reductions of 16.3 percent from 2005 levels in 2020. Three factors contribute to this outcome: greenhouse gas regulations under the Clean Air Act, secular trends including changes in relative fuel prices and energy efficiency, and subnational efforts. Nonetheless, global emissions likely will be greater than if comprehensive climate legislation had passed because of the absence of offsets, and at this point the United States is expected to fail to meet its financing commitments under the Copenhagen Accord for 2020.

Abstract: In September 2011, the National Highway Traffic Safety Administration and U.S. Environmental Protection Agency promulgated the first-ever federal regulations mandating fuel economy improvements for heavy-duty commercial vehicles. While the performance-based approach to these rules offers familiarity and assurances of fuel economy improvements, it also has some well-known weaknesses. In this paper, we describe fuel economy technologies for the trucking sector, its economic structure, the details of the new fuel economy regulations, and the controversies they sparked. We then address issues raised in reviewing the accompanying regulatory impact analysis. Next, we highlight some flaws of this form of regulation and suggest a variety of alternative, more market-oriented approaches that might work better.