The explosion of dollar stores points to the divergence in the economy and the proliferation of cheap goods

It's amazing what you can get at a dollar store.

The WSJ writes today about how Dollar General has grown into one of the biggest retail companies in the United States.

"The economy is continuing to create more of our core customer," Chief Executive Todd Vasos said in an interview at the company's Goodlettsville, Tenn., headquarters. "We are putting stores today [in areas] that perhaps five years ago were just on the cusp of probably not being our demographic," he said, "and it has now turned to being our demographic."