The U.S. economy is on a solid course with some hints of inflation so the Federal Reserve is on track for further interest rate hikes, Federal Reserve Chair Janet Yellen said on Thursday in a defense of her decision to tighten policy late last year. In a rare spectacle, Yellen spoke on a New York panel alongside her three predecessors who ran the world's most powerful central bank. She said that, seven years after the brutal financial crisis, the U.S. labor market was now "close" to full strength, again arguing that inflation would not be held down much longer by the strong dollar and low oil prices. "The U.S. ... (full story)