Media in New York City have their editorial offices based in the city. New York is home to the corporate headquarters of such publishing giants as: Among other national leaders based in New York city are "Newsweek", owned by The Newsweek Daily Beast Company", and Rolling Stone", published by Wenner Media. In the 1930s, New York-based RCA was the nation's largest manufacturer of phonographs. In the late 19th and early 20th century, most sheet music in the United States — especially the popular songs of the day, many now standards — was printed at Tin Pan Alley, so called because the constant sound of new
Concentration of media ownership in Turkey Radio and Television Enterprises and their Media Services (2011), for audio-visual media. The Turkish Competition Authority ("") is entitled to take action against distortion of competition according to another law, i.e. the Law on the Protection of Competition. Therefore, as for the broadcasting sector there are sector-specific regulatory safeguards against a high horizontal concentration. For instance, the Law requires companies that are about to take over or merge with others to seek permission from the Radio and Television Supreme Council (Radyo ve Televizyon Üst Kurulu- RTÜK) and to inform it about transactions not later than 30 days after their completion.