In this May 9, 2013 photo, a worker pushes shopping carts in front of a Walmart store in La Habra, Calif. Wal-Mart Stores Inc. is expected to report quarterly results on Thursday, May 1

 

              In this May 9, 2013 photo, a worker pushes shopping carts in front of a Walmart store in La Habra, Calif. Wal-Mart Stores Inc. is expected to report quarterly results on Thursday, May 1
In this May 9, 2013 photo, a worker pushes shopping carts in front of a Walmart store in La Habra, Calif. Wal-Mart Stores Inc. is expected to report quarterly results on Thursday, May 16, 2013. (AP Photo/Jae C. Hong)