From The Wall Street Journal:
The Federal Reserve’s forward guidance has been a lot more effective at keeping long-term rates down and stimulating the economy than its three bond-buying programs, says Eric Swanson, an economist at the University of California, Irvine, who until recently was a researcher at the San Francisco Fed.

For the full story, please visit http://blogs.wsj.com/economics/2014/10/29/the-fed-favors-guidance-over-bond-buys/.