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Pedestrians look at the Christmas window display of the Selfridges department store, operated by Selfridges Plc, on Oxford Street in London, U.K., on Monday, Dec. 17, 2012. Retailers are relying on Christmas sales to help rescue a year when high unemployment and the debt crisis have blighted spending. Photographer: Simon Dawson/Bloomberg via Getty Images

Pedestrians look at the Christmas window display of the Selfridges department store, operated by Selfridges Plc, on Oxford Street in London, U.K., on Monday, Dec. 17, 2012. Retailers are relying on Christmas sales to help rescue a year when high unemployment and the debt crisis have blighted spending. Photographer: Simon Dawson/Bloomberg via Getty Images