In his six years as Federal Reserve Chairman, Ben S. Bernanke has sometimes proved too sanguine about the U.S. economy, declaring the impact of bad subprime mortgages on the financial markets “contained” in 2007 and being too optimistic about growth last year. Now that employment is accelerating, economists wonder if the central bank again will prove to be mistaken, this time by being... moreIn his six years as Federal Reserve Chairman, Ben S. Bernanke has sometimes proved too sanguine about the U.S. economy, declaring the impact of bad subprime mortgages on the financial markets “contained” in 2007 and being too optimistic about growth last year. Now that employment is accelerating, economists wonder if the central bank again will prove to be mistaken, this time by being pessimistic about the outlook. view page