Top 20 Country GDP (PPP) History & Projection (1800-2040)
This video shows the Top 20 countries with highest GDP PPP from 1800 to 2040. It gives a brief history of the world since the 1800s. 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.
该视频显示了1800年至2040年间GDP最高的前20个国家。它简要介绍了自19世纪以来的世界历史。 中国和印度在20世纪之前领先，而美国在20世纪后开始领先。 购买力平价（PPP）是一种新古典经济学理论，它指出两国之间的汇率等于货币各自购买力的比率。