Emerging economies have accounted for almost two-thirds of the world's GDP growth and more than half of new consumption over the past 15 years. Yet economic performance among individual countries varies substantially. In Outperformers: High-growth emerging economies and the companies that propel them, the McKinsey Global Institute looks at the long-term track record of 71developing economies to identify the outperformers-and finds two key factors that helpexplain their outperformance: a pro-growth policy agenda of productivity, income, and demandthat has driven exceptional economic growth, and the underappreciated but nonethelessstandout role that large companies have played in driving that growth. 1. Eighteen of 71 countries outperformed their peers and global benchmarks.2. A pro-growth agenda of productivity, income, and demand has driven outperformance.3. The role of productive companies is a key characteristic of outperforming economies.4. Changing times spell potential new opportunities for emerging economies.5. The global economy could receive an $11 trillion boost if all emerging economies emulateoutperformers.