Economics is critical to Asia-Pacific affairs and to U.S. interests there. The region accounts for roughly half of global GDP and trade and includes some of the world's fast-growing economies. American growth and jobs increasingly depend on trade and investment with Asia, and many of the rules of the global economic system over the coming decades will be shaped there. Effective U.S. economic policies in the region are thus an essential complement to other dimensions of the rebalancing strategy, reinforcing and being reinforced by the military, diplomatic, and political elements.