At the international level, measures also have to be taken to prevent excessive food price volatility and to ensure that a pro-food security trade system is in place. For instance, when comparing the highest and the lowest income quintiles of the population in developing countries, the poorer children are almost 3 times more likely to be underweight than children in the wealthiest 20 per cent of households (United Nations, 2012c). Hence, increasing the income level of poor households will help ensure adequate food quantity and quality, and reduce the prevalence of undernourishment.