Long-term macroeconomic forecasts. Key trends to 2050. A special report from The Economist Intelligence Unit. June 2015.

“China is expected to overtake the United States in 2026 in nominal GDP in US dollar terms and maintain its position as the largest economy to 2050. India is expected to move up the rankings to third place, with real growth averaging close to 5% up to 2050. Indonesia and Mexico are expected to leap into the top ten world economies from 16th and 15th place in 2014 to fourth and ninth place respectively by 2050. We do not expect the representation of Western economies within the top-ten listing to become insignificant. The United States, Germany, the United Kingdom and France will all move down the rankings, but only Italy will lose its place within the top ten.”