The Atlanta economy is the 10th largest in the country and 18th in the world with an estimated 2014 GDP of over $324 billion. Atlanta is one of ten U.S. cities classified as an "alpha-world city" by a 2010 study at Loughborough University,[1] and ranks fourth in the number of Fortune 500 companies headquartered within city boundaries, behind New York City, Houston, and Dallas.[2] Several major national and international companies are headquartered in metro Atlanta, including seven Fortune 100 companies: The Coca-Cola Company, Home Depot, United Parcel Service, Delta Air Lines, AT&T Mobility, and Newell Rubbermaid. Other headquarters for some major companies in Atlanta and around the metro area include Arby's, Chick-fil-A, Earthlink, Equifax, First Data, Foundation Financial Group, Gentiva Health Services, Georgia-Pacific, NCR, Oxford Industries, RaceTrac Petroleum, Southern Company, Mirant, and Waffle House. Over 75% of the Fortune 1000 companies have a presence in the Atlanta area, and the region hosts offices of about 1,250 multinational corporations. As of 2006 Atlanta Metropolitan Area ranks as the 10th largest cybercity (high-tech center) in the US, with 126,700 high-tech jobs.[3][needs update]