Taking together all of the countries, one would have a view of the global economy. Understanding the global economy and the shifts among countries, businesses can better allocate capital to the areas of the world that are growing. The U.S. currently is the largest economy in the world, now followed by China. Shifts among countries in their global economic ranking are the result of many criteria, including population growth and fiscal and monetary policies. Knowing which part of the world is growing economically and which part is shrinking is extremely important for businesses.