Alfred E. Kahn, who presided over the historic deregulation of the airline industry during the Carter administration, paving the way for JetBlue and other low-cost carriers, died Monday. He was 93. Kahn, an economics professor at Cornell University, died of cancer at his home in Ithaca, N.Y., the school said in a statement. University spokeswoman Claudia Wheatley confirmed his death. A leading scholar on public-utility deregulation, Kahn led the move to deregulate U.S. airlines as chief of the now-defunct Civil Aeronautics Board in 1977-78. The board had to give its approval before airlines could fly specific routes or change fares....