在一些国家中，公民对食品价格的不满已经引起了政治动荡，最引人瞩目的就是埃及和突尼斯。 即使是食品生产国也宁愿将食品价格稳定下来 — — 过去五年，食品价格上下波动幅度实在太大了。
But, when it comes to specific policies, caution will be very much in order, for there is a long history of measures aimed at reducing commodity-price volatility that have ended up doing more harm than good.