The worst drought in over 50 years has decimated crops of soy beans and corn in the United States. (Source: New York Times, August 10, 2012). Because the production of corn has decreased, prices are expected to increase by 25 percent. These data are insufficient for calculating the elasticity of demand because we also need to know the (五十多年来最严重的干旱使美国大豆和玉米的作物大幅度消失。 (资料来源:纽约时报,2012年8月10日)由于玉米的产量下降,预计价格将上涨25%。这些数据不足以计算需求的弹性,因为我们也需要知道——中文由在线翻译而来,仅供参考)