FILE - In a Thursday, Nov. 29, 2018 file photo, Federal Reserve Chairman Jerome Powell addresses the Federal Reserve Board's 15th annual College Fed Challenge Finals in Washington. Powell said Monday, Dec. 3, 2018 that Powell says that despite solid economic progress, the country still faces a number of challenges including slow wage-growth for lower-income workers to sluggish productivity and an aging population. (AP Photo/Cliff Owen, File)

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