"We revisit a classic question in international economics: how does a country's productivity growth affect worldwide real incomes through international trade? We first identify the channels through which productivity shocks transmit in a model featuring inter-industry trade as in Ricardo (1817), intra-industry trade as in Krugman (1980), and firm heterogeneity as in Melitz (2003). We then estimate China's productivity growth at the industry level and use our model to quantify what would have happened to real incomes throughout the world if nothing but China's productivity had changed. We find that average real income in the rest of the world increased by a cumulative 0.48% from 1992-2007 due to China's productivity growth. This represents 2.2% of the total income gains to the world"--National Bureau of Economic Research web site.