15 Largest Economies in the World Ranked by 2015 PPP

2. United States

Projected 2015 GDP growth: 2.6%
GDP based on PPP valuation (in billions of dollars): 17,968.2

Abundant natural resources, a well-developed infrastructure, and a productive labor force have allowed the United States to become the largest economy in the world by nominal GDP and the second largest by PPP valuation. The country is the largest importer in the world, and as such has a trade deficit of $635 billion in 2010. Despite this, its citizens enjoy the highest average and household income among OECD nations. Poverty and unemployment are one of the biggest problems of the economy, with the unemployment rate at 7.7% as of 2013 and about half the population living in poverty, according to a US census data.

upthebanner/Shutterstock.com