The government revised its estimate of economic growth in the third quarter down slightly on Tuesday, as consumer spending helped sustain a modest growth rate despite a dip in net exports caused in part by the stronger dollar. "The Achilles heels of the second half of 2015 are inventories and trade, which remain a drag on growth," said Diane Swonk, chief economist at Mesirow Financial in Chicago. "The good news is that consumers are showing a willingness to carry the economy into the new year." At an annualised rate of two per cent, the pace of expansion in the ...