FILE - This Feb. 13, 2006 file photo President George W. Bush, right, presents the National Medal of Science to Dr. Kenneth J. Arrow, left, from Stanford University, during a ceremony in the East Room of the White House in Washington. Arrow, the youngest ever winner of a Nobel prize for economics, has died. His son, David, says Arrow died on Tuesday, Feb. 21, 2017, at his home in Palo Alto. (AP Photo/Pablo Martinez Monsivais, File)
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