Deadweight loss: The economics of unhealthy food Malnutrition has historically been understood as a food decit problem plaguing mostly poor and underdeveloped countries. However, a different form of this problem is now spreading across all parts of the world, as our diets are increasingly dominated by highly processed food which is energy-dense but low in the types of nutrients we need to stay healthy (\"Obese children will outnumber the underweight for the rst time\