Businesses are holding back on long-term investment, but the reason is unclear. The "fiscal cliff" is a strong possibility, which is good news if true, Neil Irwin writes. "The executive who didn't buy that machine or truck in October 2012 might instead do so in January or February of 2013, creating a nice bounce for overall growth," Irwin notes. However, there is a possibility that businesses are holding back because of fundamental weakness in the economy.
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