Mike Duke — American Businessman born on December 07, 1949,

Michael Terry "Mike" Duke is an American businessman. He served as the fourth chief executive officer of Walmart from 2009 to 2013... (wikipedia)

At Wal-Mart, it goes back to Sam Walton and the foundation and business model that we simply operate for less, or everyday low cost. We're known for operating in a very efficient way and then giving those savings to customers.
I think every responsible public board at every board meeting should be discussing succession. And, of course, Walmart has a very mature board: our chairman Rob Walton and other members. So succession is an ongoing. I think when I first joined the board of directors, it was discussed then. And it's discussed at every board meeting continually.
I actually think it's better I started by being close to customers. That foundation early on helped me later when I went into logistics and other kinds of management.
I spend my time being a retailer, not an economist.
If I spend all of my day in the details as a CEO of a company like Wal-Mart, I think it would be trouble, because I wouldn't really be prepared to speak to the big issues that the country or the world should face.