Michigan typically ranks second or third in overall Research & development (R&D) expenditures in the United States. Metro Detroit is an important source of engineering and high-tech job opportunities. As the home of the "Big Three" American automakers (General Motors, Ford, and Chrysler), it is the world's traditional automotive center and a key pillar of the U.S. economy. In the 2010s, the domestic auto industry accounts, directly and indirectly, for one of ten jobs in the United States, making it a significant component for economic recovery.