The IMF estimates advanced economies will grow 2.5% in 2018 and 2.2% in 2019, up half a point each from their 10/17 report. US growth was boosted from 2.3% to 2.9% this year and 1.9% to 2.7% for 2019 due to powerful temporary fiscal stimulus. The IMF also noted that longer-term prospects for advanced economies are sobering given aging populations, weak productivity growth, high debt, possibly reduced trade and more.