““RETAILERS KNOW THEIR shelfspace is a valuable resource. But this is a recent discovery; in the past, they gave it away, then they thought of selling it. Manufacturers either paid directly, via slotting allowances etc., or paid in materials and labour to make the shelves more attractive and better organised; then they paid both as demand for shelfspace exceeded supply. More recently, for fast turnover items, manufacturers such as Frito-Lay have used a direct delivery and merchandising service where their people will spend pretty much all day in store refilling shelves to their and the store’s mutual benefit.””