Emerging markets seem poised to enjoy solid growth in 2013, and the main driver of that growth will be the U.S., says one well-respected economist. "I'm a firm believer that 2013 will deliver a strong period of growth (overseas) driven by the U.S.," said Andrew Wilkinson, chief economic strategist at Miller Tabak in New York. What makes Wilkinson so upbeat on the U.S.? He approves of the Fed's response to the economy's travails, "which, in my