"[Hiring undocumented workers] seriously erodes wages and working conditions, partly because employers that hire these folks know that there's very little chance that they will get reported by those workers for wage and hour violations or safety violations or anything else," says Peter Cappelli, professor of management at the Wharton School at the University of Pennsylvania.
While the Supreme Court may have loosened the law considerably with its decision, Massey doesn't believe it will inspire undocumented workers to flock to Arizona.
"I don't expect the Supreme Court ruling to make Arizona more attractive to immigrants, because it let stand the stop-and-search policies," he says.
Danielle Kurtzleben is a business and economics reporter for U.S. News & World Report. Connect with her on Twitter at @titonka or via E-mail at email@example.com.