Economy of New York City feet (37.2 million m) that same year, is the largest central business district in the world. New York City is distinctive for its high concentrations of advanced service sector firms in the law, accountancy, banking and management consultancy fields. It is the top global center for the advertising industry, which is metonymously called "Madison Avenue". Silicon Alley, metonymous for New York's broad-spectrum high technology sphere, continues to expand. Finance, high technology, real estate, insurance, and health care all form the basis of New York's economy. The city is also the nation's most important center for mass media, journalism, and publishing.
Concentration of media ownership in Turkey for RTÜK should be re-structured as to minimize political influence over appointments. Cross-ownership refers to the concentration of ownership in different media sectors (i.e. across TV– Print– Radio– Online). In 2002, Law No. 4756 removed many cross-ownership restrictions, allowing, for example, a media company to own 244 local and regional and 30 national stations all at once. In the 2016 survey by MOM (Media Ownership Monitor), cross-ownership concentration in Turkey is measured by adding and weighting the market shares of the Top 8 owners across all sectors. The top eight owners of media in Turkey share approximately 40% of the