sorry, premium content so i cant provide the whole thing, charts and all
but here's the relevant comment:
"If countries’ economies are measured using market exchange rates (the rates at which firms trade and repatriate profits), in 2026 America will remain comfortably the world’s number one, according to long-range forecasts by the Economist Intelligence Unit. It will still account for more than one-quarter of global output, twice as much as second-placed China, which will itself have comfortably overtaken Japan.
But when countries are compared using purchasing-power parity rates (PPP), which adjust for price differences between countries and reflect the actual buying power of local income, China overtakes America in about 2017. Though far from perfect, PPP is a better way of comparing economic size. By this measure, in 2026 India will be the third-biggest economy, well behind America but far ahead of Japan. Indeed, by then youthful India will be growing faster than an ageing China."