The economy of metropolitan Detroit
is a key pillar of the economy of the United States
. Its ten county area has a population of over 5.3 million, a workforce of 2.6 million, and about 240,000 businesses. Detroit's six county Metropolitan Statistical Area
has a population of about 4.5 million, a workforce of about 2.1 million, and a Gross Metropolitan Product of $177.5 billion. Detroit's urban area
has a population of 3.9 million. A 2005 PricewaterhouseCoopers
study estimated that Detroit's urban area had a Gross Domestic Product of $203 billion.
About 80,500 people work in downtown Detroit, comprising 21 percent of the city's employment. Metro Detroit has propelled Michigan's national ranking in emerging technology fields such as life sciences, information technology, and advanced manufacturing; Michigan ranks fourth nationally in high tech employment with 568,000 high tech workers, which includes 70,000 in the automotive industry. Michigan typically ranks third or fourth in overall Research & development (R&D) expenditures in the United States. Metro Detroit is an important source of engineering job opportunities. Detroit is known as the automobile capital of the world, with the domestic auto industry primarily headquartered in Metro Detroit. New vehicle production, sales, and jobs related to automobile use account for one of every ten jobs in the United States.