My wife and I have often shopped at the Wal-Mart in Lewisburg, WV, about 20 miles from our farm. The store, like all Wal-Marts, is open 24 hours a day, every day of the year. The convenience is important, when you have worked until after sunset in a field or woods on a farm or logging site and have to drive an hour to get to the store by late evening. We have noticed the first of the month government check cycle, too, in which households getting government assistance stock up on a large number of items that have run low during the month. Wal-Mart understands this cycle and plans its packaging sizes and displays and stock to coincide with the amount of money those on government assistance have, at any particular moment in the cycle, to spend. Here, the CEO of Wal-Mart US explains.