The U.S. economy is the largest economy in the world in terms of GDP both in PPP and in nominal terms. The U.S. economy is one of the most diversified national economies in the world and holds the leadership in the global economy last 100 years. However, since the early 2000s as a result of crises and growth in developing countries, its influence in the world economy has declined slightly. GDP for 2011 was amounted to $ 15.2 trillion. The State duty to corporations and individuals resident in the ...