Ben Bernanke's swearing in as Federal Reserve chairman in 2006 marked the end of Alan Greenspan's long, legendary career. To date, the new chair has garnered mixed reviews. Business economists see him as the best-qualified successor to Greenspan, while many traders and investors worry that he's too academic for the job. Meanwhile, many ordinary Americans do not even know who he is. How will Bernanke's leadership affect the Fed's actions in...