C. Peter Timmer writes about the causes of high food prices, focusing on staple grains - rice in particular - and edible oils. He shows that although food prices have come down from the spikes of early 2008, they are likely to remain higher than they were in early 2007 for years to come. The...

Food prices are a key signal about what is happening to food security, and two dimensions are important: their average level (and whether this is rising or falling in the long run) and their volatility. Food price instability slows down economic growth and the structural transformation that is...