**FILE** Nobel Laureate Joseph Stiglitz, delivers keynote address at the national seminar on 'Making Globalization Work: An Indian Perspective organized by Federation of Indian Chambers of Commerce and Industry, in New Delhi, India, in this Dec. 18, 2006 file photo. The U.S. could face a prolonged economic downturn due to its subprime mortgage woes, but is unlikely to plunge into a recession, Nobel economics laureate Joseph Stiglitz said Thursday, Aug. 30, 2007. (AP Photo/Manish Swarup, file)