This month’s issue provides projections for the output growth of the world economy for 2011, 2011–2015, and 2015–2020. Global growth will slow from 4.5 percent in 2010 to 4.2 percent in 2011, but the world economy will grow faster in the second decade of the twenty-first century than it did in the first. Advanced economies as a group will contribute less than 1 percentage point to the global growth rate during the next decade, whereas 3.4 percentage points will come from emerging economies, including China’s significant contribution of 1.7 percentage points. The November issue also examines the upside and downside risks for the projections for advanced and emerging economies.