Fed eyes U.S. rate hike, but second-guesses economic gauges

By Ann Saphir and Jonathan Spicer SAN FRANCISCO/RUSTON, La. (Reuters) - Federal Reserve Chair Janet Yellen has declared that the U.S. central bank's interest-rate decisions will depend on how the economy performs. "I would take the first-quarter real GDP estimates with a big grain of salt," the San Francisco Fed's chief of research, Glenn Rudebusch, told Reuters in an interview on Friday. "First-quarter will be weak, but we think that it is not representative of the underlying strength of the ec