Do We Know What We Do not Know? A Response to Celine Bonnet

Food taxes increase prices of food or food ingredients in order to stimulate consumers to change their eating behaviour and finally to level up population health. Their aim is to tackle the high rates of obesity and other lifestyle diseases. As Bonnet argues, often food taxes are set up out of an economic perspective (1). To change consumer behaviour is one thing, to level up people’s health is a complex matter.