San Francisco Chronicle: People around the world are experiencing sticker shock at the grocery store, the result of runaway economic forces that show no signs of abating. Here in the United States, the price of eggs jumped 29 percent last year. Dairy products are up more than 7 percent. And the price of corn has tripled in the past four years. It’s even worse worldwide. Globally, the food price index calculated by the Food and Agriculture Organization of the United Nations rose by nearly 26 …