He wanted interest rates kept low to discourage the hoarding of money and encourage consumption and, by extension, full employment.

ECONOMIST: The impossible task of eliminating uncertainty

The full impact on the iMessage system on mobile voice consumption is yet to be determined.

FORBES: As iPhone Mobile Data Usage Soars, Voice Calls Dive

Lutz Kilian, at the University of Michigan, suggests that unless energy consumption is reduced or new supplies found a full recovery from the financial crisis will push the oil price back to its highs of mid-2008.

ECONOMIST: Commodity prices and global growth