In the case of oil, as Daniel Gros of the Centre for European Policy Studies pointed out in the Financial Times last week (this page, July 10), speculation is inherent in deciding whether to produce.

• 鉴于全球经济增长正在放缓，石油及其它大宗商品价格的不断飙升让人感到困惑。6月份分析师的普遍预期为：今年全球经济将增长2.；9%25（按市场汇率计算），低于2007年的3