The U.S. economy likely grew at a brisk clip in the fourth quarter as lower gasoline prices buoyed consumer spending, in a show of resilience despite a darkening global outlook. “The consumer did the heavy lifting and I don’t think there is any reason to expect that to change in the first half of this year because of the enormous tailwind from lower gasoline prices,” said Ryan Sweet, a senior economist at Moody’s Analytics in West Chester, Pennsylvania. Consumer spending, which accounts for more than two-thirds of U.S.