Can America keep it up? Dec 14th 2005 From The Economist Global Agenda As the Federal Reserve raises interest rates again and the trade deficit breaks another record, the American economy continues to confound the sceptics. Thanks for that go largely to resilient consumers and booming productivity FOR several years now, economists have been watching American consumers with the same mixture of astonishment and anticipation that wide-eyed fans bring to endurance sports: amazing that they’ve made it so far, but how much longer can they go on like this? Strong consumer spending has underpinned America’s robust economic expansion, even as...