Position of supermarkets in view 

Using various sources of information and discussions with experts, we depicted the links and volumes of the associated product flows for six food chains (apples, eggs, tomatoes, onions, pigs, and dairy) in Sankey diagrams. These diagrams show which product flows enter and leave the chain along different links. This provides insight int the share of individual links and puts the position of supermarkets in perspective by comparison to the other links in the chain.