ByJohn S. McClenahen The quickness of Enron Corp.'s collapse and filing for bankruptcy protection "is just absolutely astonishing," says Paul R. Kleindorfer, a professor at the University of Pennsylvania's Wharton School of Business in Philadelphia and co-director of Wharton's Risk Management & Decision Processes Center. Nevertheless, Enron's fall is unlikely to halt deregulation, Kleindorfer contends. It "is not going to turn out the lights anywhere that I know of," he says. Enron's collapse is an indictment of the company's management style but not of deregulation, he stresses.