Do Gasoline Demand Elasticities Vary?
研究汽油需求弹性在价格涨跌期间的变化，发现短期弹性由效率提升和里程减少共同贡献，长期则90%来自汽车效率改进，有助于预测市场波动和其他国家的弹性。
This paper answers questions concerning gasoline-demand elasticity by analyzing periods that span both increasing and decreasing prices, focusing on consumer decisions about the distance driven and the automobile size. US data show that efficiency changes and reduced mileages account equally for short-run elasticities, while automobile efficiency accounts for 90% in the long run. The analysis shows a consistency that makes it useful in projecting elasticities during market disruptions and over a broad span of economic conditions in other countries. 38 references. (DCK)