Donald Trump claims he should be president in part because he has succeeded at creating jobs and businesses.

While the foundation of his business empire was in New York real estate and construction—thanks to “a million-dollar loan” from his father—he spent about 25 years owning and/or managing casinos in Atlantic City, which sought to rival Las Vegas as America’s gambling capital.

These experiences, he argues, make him uniquely qualified for the Oval Office. He also claims he would create 25 million jobs over the next decade as president. This, in his mind, entitles him to speak for America’s working class.

“I’m the only one on the stage that’s hired people,” he said during a Republican primary debate earlier this year. “I’ve created tens of thousands of jobs and a great company.”

Trump’s business background is one of the top reasons people cite for supporting him. His claims of corporate success and the creation of “tens of thousands” of jobs invite scrutiny, however, which I provide in my new working paper, “Making America Worse: Jobs and Money at Trump Casinos, 1997-2010.”