It never fails. A terrible disaster wreaks havoc and ruin, and is promptly followed — or even, as in this case, preceded — by experts insisting that the devastation will be great for the economy. Could

 A window was broken. Is this a net negative or positive for the economy? Look to your intuition. Does this sound to you like a net negative or positive?  Some (Keynes, Krugman, Bernanke) say: