New York City in the world at 103, including former Mayor Michael Bloomberg. New York also had the highest density of millionaires per capita among major U.S. cities in 2014, at 4.6% of residents. New York City is one of the relatively few American cities levying an income tax (currently about 3%) on its residents. New York is a global hub of business and commerce. The city is a major center for banking and finance, retailing, world trade, transportation, tourism, real estate, new media, traditional media, advertising, legal services, accountancy, insurance, theater, fashion, and the arts in the United States; while Silicon Alley,
Silicon Hills in Round Rock, a suburb of Austin. Austin was one of the top areas for venture capital with investors investing $621 million in 2013 (43% of that went to software and semiconductor firms). Some venture capital investors include Austin Ventures, Central Texas Angels Network, and Tritium Partners. There are at least 15 startup incubators as well, including: Capital Factory, Austin Technology Incubator, and the IC Institute (the incubator for the University of Texas at Austin). Silicon Hills Silicon Hills is a nickname for the cluster of high-tech companies in the Austin metropolitan area in the U.S. state of Texas. The