At dinner with a group of journalists, U.S. Treasury Secretary Lawrence Summers was similarly unhelpful about how long the U.S. boom could last.
The bank CEO declined to give a timeline but said it "depends how long the Germans hold out... how long the German population is willing to buy into supporting" fiscal union.
Mr. THOMPSON: I don't know how long Mr. Rumsfeld intends to stay but I do know this - he's not going to leave under fire.
To determine the top U.S. cities for yoga, we turned to data from the marketing firm GfK MRI, which conducted surveys in 205 markets last year, asking participants whether they practiced yoga, and if so, how frequently and for how long.
All told, Netflix now has more than 33 million streaming customers worldwide, including 27.1 million in the U.S. Hastings believes Netflix eventually will have 60 million to 90 million U.S. subscribers, although he hasn't said how long it might take to reach that goal.
After all, President George W. Bush had said we would get bin Laden, dead or alive, no matter how long it took.
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What they cannot bring is any idea of how long Ms. Miller's confinement will last.
U.S. obstetricians have long told nauseated pregnant women how to mix up the right dose themselves.
The record companies really don't like the idea of free music - so presumably the tortured negotiations have centred around just how much will be given away for how long.
Mr. Milner declined to say how much money the Breakthrough Prize in Life Sciences Foundation has in its coffers, or how much each of its sponsors contributed or for how long.
But with leadership succession fights now under way in Israel and the U.S., it's not clear whether direct engagement will prevail, or how long Israel is willing to wait.
Yet again, the future of Greece hangs in the balance, as the Greek people wonder how much more pain they will be asked to endure and for how long.
"I also remember that I lent him a book on SAS survival... it had things like how to survive in the outdoors for long periods of time, " he said.
Now, all his supporters have to figure out is how much disappointment they're willing to put up with, and for how long.
Mr. MCWHORTER: Depends on how long you stay as a security guard.
We wanted to investigate to find out who knew what, when, and for how long.
It's unclear why the Russians were eavesdropping on the mother or for how long.
The blending itself changes how we work, as well as how long we work.
What cannot easily be known is what it was beforehand, and for how long.
Research results are all over the place, depending on which patients are studied and for how long.
It will depend, he says, on what sort of war it is, and how long it lasts.
So international travel is unlikely to revive until that response is over, no matter how long it takes.
This has often involved headsets worn by customers that track where their gaze falls and for how long.
CNN: Watch this space: Eye-control to give technology a new look
Other writers get various amounts depending on who they are and what the work is, how long, etc.
FORBES: Why the Times Pays Writers Even When It Doesn't Have To
There's eye tracking to monitor what people look at on a page or screen and for how long.
At age three, he could be sent away from his family who knows where for who knows how long.
Basically, HP has announced something like that every year for we don't even know how long.
ENGADGET: HP announces the EliteBook Revolve, a Windows 8 convertible for the business crowd (video)
Deciding who will go into what kind of business and for how long.
We'll go easy with the rehab and then see how long it takes.
How long before U.S. corporate profits, now at historical highs, revert to mean?
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