Aug. 21 (Bloomberg) -- Martin Feldstein, an economics professor at Harvard University, talks with Bloomberg's Kathleen Hays about the outlook for the US economy. Feldstein also discusses the future of Federal Reserve Chairman Ben S. Bernanke and the impact of government stimulus spending on the economy and financial markets. They speak at the annual Kansas City Fed symposium in Jackson Hole, Wyoming. (Source: Bloomberg) ... feldstein martin kathleen hays bloomberg tv jackson hole fed federal ...