Top 10 Country GDP (PPP) History & Projection (1AD-2050)

This video shows the Top 10 countries with highest GDP PPP from 1AD to 2050 based on 2011 international dollars. It gives a brief history of the world since the 1AD. China and India were ahead before the 1900s while the US started leading after the 20th century.

Purchasing power parity (PPP) is a neoclassical economic theory that states that the exchange rate between two countries is equal to the ratio of the currencies' respective purchasing power.

Source:
The Angus Maddison Project & World Bank