The New York Metro's Economy Is Almost as Large as Australia's

More and more, the U.S. economy is defined by its metropolitan areas, which produce 90 percent of its output. On an individual level, some of these metros are themselves quite large. The map below lays this out geographically, including a sampling of how ten cities stack up economically against major nations of the world.

The map, by my colleague Zara Matheson of the Martin Prosperity Institute, compares the 2014 projections of gross product for U.S. metropolitan statistical areas to national GDP levels for 2012, the most recent year available worldwide.