It hardly shrieks of billion-dollar glamour. The US nerve centre of the world's largest retailer, Wal-Mart, consists of a collection of low-slung prefabricated buildings along a four-lane highway in north-western Arkansas. Wal-Mart's head office is hundreds of miles from the nearest big city. It isn't even handy for the state capital, Little Rock, which is three and half hours' drive away.
But hopeful merchants beat a path from all corners of the world to hawk their wares here, in a series of bare Perspex rooms along a "supplier corridor". Staff work in spartan cubicles and reminders of the retailer's low-cost culture are constant – in an employee lounge an honesty box invites payment for tea and coffee with a blunt message: "Drinks are not free."
