Many economists have long suspected that official government statistics here provided only a shadow of reality.

With China's announcement on Tuesday that its economy was considerably bigger than previously estimated, economists and financial prognosticators are scrambling to rethink their assessment of China's rise and its role on the world stage. China's new figures suggest that it probably has passed France, Italy and Britain to become the world's fourth-largest economy.

Some economists are even accelerating their timetables for when China may eclipse the United States as the world's biggest economy. With the new figures offering a more expansive view of economic activity, some said China could overtake the United States as early as 2035, at least five years earlier than previous projections.