The world economy or global economy is the economy of the world, considered as the international exchange of goods and services that is expressed in monetary units of account (money).
Global Gross domestic production is defined ad total value of goods and services manufactured in term of one year.
United States of America tops the list of countries with highest GDP followed by China, Japan and Germany.
Although developing nations such as India, China, Brazil and Russia are the top countries which are growing at rate higher than the global rate.
World Economy Statistics Graph
List of the 25 largest economies by GDP (nominal) at their peak level of GDP in millions US$
Other Economy Growth Indicators.