世界粮食价格的变化趋势粮食价格走势是粮食供求状况变化的轨迹。粮食作为一种较特殊的商品,在每个国家几乎都受政府或多或少的干预。但是,在世界粮食市场上,任何一个国家政府的控制作用都是有限的。因此,世界粮食市场十分接近于经济学所说的“完全竞争市场”。在世界市场上,生产国对粮价的反应是相当灵敏的。就从70年代以来的历史看,每次较大幅度的粮食涨价,接着都有生产量的较 Trends in World Food Prices The trends in food prices are the tracks of changes in food supply and demand. As a special commodity, food is almost always interfered with by the government in every country. However, the control of any one government in the world food market is limited. Therefore, the world food market is very close to what economists call “perfectly competitive markets.” In world markets, the reaction of producer countries to food prices is quite sensitive. From the history of the 1970s, each relatively large increase in grain prices followed by a