There's a low rumble at idle, and above 4, 000 rpm this slowly rises in urgency.

FORBES: Test Drives

What with record low interest rates, idle construction workers and a huge backlog of worthy projects, there has never been a better time to invest in infrastructure.

ECONOMIST: How not to fund infrastructure

It is rather as though a household with lots of cash sitting idle in a low-interest bank account was at the same time paying a much higher interest rate on its debts.

ECONOMIST: Intervention: divine or comic?

But Albuquerque stood out for its cheap housing, low taxes and labor costs and lots of developable land that lay idle.

FORBES: Ready for Takeoff

If I own a widget factory and half of my widget makers are only operating one shift a day and half of them are idle, I am not going to take out a loan to expand no matter how low the interest rates are.

FORBES: Why The Monetary Stimulus Didn't Work