Some of Rigobon’s findings: In Chile, when the price of wheat goes up by 10%, the price of bread goes up by 5% 18 months later. In Colombia and Peru, it takes three years for this same percentage increase to occur, with these countries taking longer “to digest the international shock of commodity prices.” Not only do the prices of bread, cookies, meat, chicken, move in lockstep with wheat, but in some cases, so do housing, health and education. But Rigobon found that when the international price of oil increases, there is an immediate impact on all products related to oil. What’s worse, when the price of oil increases, the price of gas at the pump or for a rental car goes up disproportionately.