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.
Transparency of media ownership in Europe outputs and contents while transparency empowers readers to detect and appraise owners influences on the media and its contents. The European Commission's study on Indicators for Media Pluralism (2009) recognises transparency of media ownership and/or control as a key indicators of media pluralism. Also, media ownership transparency is essential for preventing concentration of media power which can unduly influence public opinion and the political debate. Precisely, transparency of media ownership is a precondition for assessing levels of concentration or other dimensions of diversity in a given media system. Indeed, if readers don't know who the real owners of media companies