What is the use of GDP? What are its shortcomings? What is the difference between real GDP and nominal GDP? Does GDP accurately reflect our nation's productivity? Why or why not? Is there a relationship between GDP and the business cycle? If so, what relationship exists and how might a business manager use this information to increase their profits? Is GDP a good measure for economic growth? Is GDP a good measure of economic welfare? Are there any other measuring tools for economic growth and economic welfare? please include references