A new dataset on export sophistication reveals that in many countries the importance of modern services, and the sophistication of manufactured and service exports, has increased over time. However, this trend was less pronounced in LICs. Sophisticated sectors are more likely to act as a catalyst for broad-based economic growth, rather than turning into isolated enclaves, when the economy is liberalized, the exchange rate is not overvalued, and there are good information flows. An educated workforce, external liberalization, and good information flows are important prerequisites for developing