The U.S. economy expanded at a 2.5 percent pace in the first three months of 2013, up from 0.4 percent in the previous quarter, as consumer spending rose at the fastest rate in two years and businesses restocked warehouse shelves, according to a report today from the U.S. Department of Commerce, MarketWatch reported. Consumer spending rose 3.2 percent to mark the sharpest gain since the end of 2010, though some of the increase was the result of higher oil prices.