It's hard to believe that the economy can keep up its breathtaking 6% growth rate of the past three quarters. And very likely it will not, if only because consumers seem poised to take a breather from their dizzying pace of spending. But even if demand cools off a bit in the second quarter, investors and policymakers will have to answer two key questions: Will the slowdown be lasting or temporary? And will it be enough to ease the Federal Reserve's worries about inflation?
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